42 results on '"Gali H"'
Search Results
2. Interpersonal dysfunction predicts subsequent financial exploitation vulnerability in a sample of adults over 50: a prospective observational study
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Aaron C. Lim, Laura Mosqueda, Annie L. Nguyen, Tyler B. Mason, Gali H. Weissberger, Laura Fenton, Peter Lichtenberg, and S. Duke Han
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Psychiatry and Mental health ,Geriatrics and Gerontology ,Pshychiatric Mental Health ,Gerontology - Abstract
The goal of this study was to test whether interpersonal dysfunction, characterized by loneliness and/or dissatisfaction with relationships, is an imminent predictor of financial exploitation vulnerability (FEV) among adults age 50+ within a 6-month observation period. This study also tests whether FEV prospectively predicts interpersonal dysfunction.Twenty-six adults aged 50 or older completed a study involving baseline data collection and 13 follow-ups over 6 months. Linear mixed models were used for primary analyses.After adjustment for demographic, psychological and cognitive covariates, there were between-person effects of FEV and interpersonal dysfunction across follow-ups, suggesting that those with generally higher interpersonal dysfunction compared to other participants also reported greater FEV (Among adults age 50+, individuals with higher interpersonal dysfunction relative to others in the study reported greater FEV throughout the 6-month observation period. Increased loneliness and social dissatisfaction, relative to one's average level, predicts subsequent increases in FEV, and may be an imminent risk factor for exploitation.
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- 2023
3. The Association Between Views of Aging and Subjective Cognitive Complaints in Older Adults: Findings From Two Samples
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Gali H. Weissberger, Ehud Bodner, Yuval Palgi, Gitit Kavé, Dov Shmotkin, and Amit Shrira
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Aged, 80 and over ,Ageism ,Male ,Cognition ,Cross-Sectional Studies ,Health (social science) ,Attitude ,Social Psychology ,Cognitive Aging ,Humans ,Female ,Geriatrics and Gerontology ,Aged - Abstract
This cross-sectional study examined whether views of aging (VoA) relate to subjective cognitive complaints in two separate cohorts of older adults. Ageist attitudes, attitudes to aging (psychological loss, physical change, and psychological growth), subjective age, and subjective successful aging were examined. A moderating effect of chronological age was also examined. Samples included 572 adults aged 50 or older (Sample 1; mean age = 67.63, SD = 11.39, 49.4% female) and 224 adults aged 65 or older (Sample 2; mean age = 81.50, SD = 6.61, 75.3% female). More negative VoA (higher ageist attitudes, lower psychological growth, lower physical change, older subjective age, and less successful aging) were associated with more subjective cognitive complaints after controlling for covariates. An increase in chronological age strengthened some of these associations. Findings suggest that improving dimensions of VoA may have a complementary positive effect on subjective cognitive complaints in older adults.
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- 2022
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4. Financial Altruism is Associated with Alzheimer’s Disease Neurocognitive Profile in Older Adults
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Gali H Weissberger, Anya Samek, Laura Mosqueda, Annie Nguyen, Aaron Lim, Laura E. Fenton, and Duke Han
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Psychiatry and Mental health ,Cellular and Molecular Neuroscience ,Developmental Neuroscience ,Epidemiology ,Health Policy ,Neurology (clinical) ,Geriatrics and Gerontology - Published
- 2022
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5. Subjective socioeconomic status is associated with risk aversion in a community-based cohort of older adults without dementia
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Gali H, Weissberger, S Duke, Han, Lei, Yu, Lisa L, Barnes, Melissa, Lamar, David A, Bennett, and Patricia A, Boyle
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General Psychology - Abstract
Attitudes towards risk impact financial decisions that are critical in older adulthood. Socioeconomic status (SES) influences an individual’s level of risk aversion; however, the association of subjective SES (i.e., social standing relative to others) with risk aversion has not been explored. We examined whether subjective SES is associated with risk aversion independent of objective SES (i.e., income, education). Participants were 933 older adults without dementia from the Rush Memory and Aging Project (MAP) or Minority Aging Research Study (MARS), two longitudinal epidemiologic studies of aging. Participants completed assessments of risk aversion, subjective SES, and cognition. We examined associations of subjective SES with risk aversion using mixed models adjusting for participant characteristics, objective markers of SES and global cognition. In bivariate analyses, lower global cognitive functioning, lower income, female sex, Black race, and lower subjective SES were associated with greater risk aversion. Results of the nonlinear mixed effects model revealed that higher subjective SES was associated with less risk aversion (Estimate = −0.238, SE = 0.083, p = 0.004), after controlling for covariates. Age, sex, race, and global cognition were also associated with risk aversion in the mixed effects model (ps ≤0.03), although income and education were not (ps ≥ 0.27) The relationship between subjective SES and risk aversion did not differ by sex or race (ps ≥ 0.31). Findings suggest that subjective SES contributes to risk aversion regardless of sex or race. Findings support the importance of considering subjective indicators of SES as they may impact an older adult’s economic preferences.
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- 2022
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6. Socioeconomic Mobility and Psychological and Cognitive Functioning in a Diverse Sample of Adults With and Without HIV
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Gali H. Weissberger, Alaina I. Gold, April D. Thames, Kayla Tureson, and Rodolfo A. Nunez
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Adult ,Male ,HIV Infections ,White People ,Young Adult ,03 medical and health sciences ,Cognition ,0302 clinical medicine ,Humans ,Medicine ,Cognitive skill ,Effects of sleep deprivation on cognitive performance ,Adverse effect ,Socioeconomic status ,Applied Psychology ,business.industry ,Social mobility ,030227 psychiatry ,Psychiatry and Mental health ,Cross-Sectional Studies ,Social Class ,Female ,business ,Psychosocial ,030217 neurology & neurosurgery ,Clinical psychology ,Executive dysfunction - Abstract
Objective This cross-sectional study examined the effects of socioeconomic status (SES) mobility from childhood to adulthood on psychological and cognitive well-being in African American and non-Hispanic White HIV-positive (HIV+) and HIV-seronegative (HIV-) adults who are part of an ongoing study investigating psychosocial and neurobehavioral effects of HIV. Methods Participants (N = 174, 24.1% female, 59.2% African American, 67.8% HIV+) were categorized into four groups (upward mobility, downward mobility, stable-not-poor, chronic-poverty) based on self-reported childhood and current community SES (which were correlated with objective measures of SES and proxies of childhood SES). SES groups were compared on self-report measures of psychological well-being, subjective executive functioning ratings, and performance across six cognitive domains. Primary analyses were stratified by HIV status. Results For the HIV+ group, SES mobility was associated with psychological well-being (chronic burden of stress: F(7,101) = 3.17, mean squared error [MSE] = 49.42, p = .030, η2 = 0.14; depressive symptoms: F(7,101) = 4.46, MSE = 70.49, p = .006,η2 = 0.14), subjective ratings of executive dysfunction (F(7,101) = 6.11, MSE = 114.29, p = .001,η2 = 0.18), and objective performance in executive functioning (F(9,99) = 3.22, MSE = 249.52, p = .030, η2 = 0.15) and learning (F(9,99) = 3.01, MSE = 220.52, p = .034, η2 = 0.13). In the control group, SES mobility was associated with chronic stress burden (F(5,49) = 4.677, p = .025, η2 = 0.15); however, no other relationships between SES mobility and outcomes of interest were observed (all p values > .20). In general, downward mobility and chronic poverty were associated with worse ratings across psychological well-being measures and cognitive performance. Conclusions Findings within the HIV+ group are consistent with previous studies that report downward mobility to be associated with poor psychological outcomes. People living with HIV may be particularly vulnerable to the adverse effects of socioeconomic instability.
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- 2021
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7. Increased Financial Altruism is Associated with Alzheimer's Disease Neurocognitive Profile in Older Adults
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Gali H. Weissberger, Anya Samek, Laura Mosqueda, Annie L. Nguyen, Aaron C. Lim, Laura Fenton, and S. Duke Han
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Male ,General Neuroscience ,General Medicine ,Neuropsychological Tests ,Verbal Learning ,Altruism ,Article ,Psychiatry and Mental health ,Clinical Psychology ,Alzheimer Disease ,Mental Recall ,Humans ,Female ,Geriatrics and Gerontology - Abstract
Background: Older age is associated with an increase in altruistic behaviors such as charitable giving. However, few studies have investigated the cognitive correlates of financial altruism in older adults. Objective: This study investigated the cognitive correlates of financial altruism measured using an altruistic choice paradigm in a community-based sample of older adults. Methods: In the present study, a sample of older adults (N = 67; M age = 69.21, SD = 11.23; M education years = 15.97, SD = 2.51; 58.2% female; 71.6% Non-Hispanic White) completed a comprehensive neuropsychological assessment and an altruistic choice paradigm in which they made decisions about allocating money between themselves and an anonymous person. Results: In multiple linear regression analyses that controlled for age, education, and sex, financial altruism was negatively associated with performance on cognitive measures typically sensitive to early Alzheimer’s disease (including word list learning and recall, delayed story recall, and animal fluency). Conclusion: Findings of this study point to a negative relationship between financial altruism and cognitive functioning in older adults on measures known to be sensitive to Alzheimer’s disease. Findings also point to a potential link between financial exploitation risk and Alzheimer’s disease in older age.
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- 2022
8. Discovery and Development of a Novel mPGES-1/5-LOX Dual Inhibitor LFA-9 for Prevention and Treatment of Chronic Inflammatory Diseases
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Yarla NS, Pathuri G, Gali H, Terzyan S, Panneerselvam J, Chandrakesan P, Scotti MT, Houchen C, Madka V, and Rao CV
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drug design ,mpges-1/5-lox dual inhibitor ,lfa-9 ,Pathology ,RB1-214 ,lipids (amino acids, peptides, and proteins) ,Therapeutics. Pharmacology ,RM1-950 ,cancer chemoprevention ,anti-inflammatory agent - Abstract
Nagendra Sastri Yarla,1 Gopal Pathuri,1,2 Hariprasad Gali,2 Simon Terzyan,3 Janani Panneerselvam,1 Parthasarathy Chandrakesan,4 Marcus Tullius Scotti,5 Courtney Houchen,4 Venkateshwar Madka,1 Chinthalapally V Rao1,6 1Center for Cancer Prevention and Drug Development, Hem-Onc Section, Department of Medicine, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; 2College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; 3Laboratory of Biomolecular Structure and Function; Department of Biochemistry and Molecular Biology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; 4Division of Digestive Diseases and Nutrition, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; 5Laboratory of Cheminformatics, Program of Natural and Synthetic Bioactive Products (PgPNSB), Health Sciences Center, Federal University of Paraíba, João Pessoa, PB, Brazil; 6VA Medical Center, Oklahoma City, OK 73104, USACorrespondence: Chinthalapally V Rao Tel +1 405-271-3224Email CV-Rao@ouhsc.eduBackground: Non-steroidal anti-inflammatory drugs, cyclooxygenase (COX)-2 selective inhibitors, have been explored for prevention and treatment of several inflammatory chronic conditions including arthritis, and cancer. However, the long-term use of these drugs is associated with gastrointestinal, renal, and cardiovascular side effects. Later, COX/5-lipoxygenase (5-LOX) dual inhibitors (eg, licofelone) have been developed but did not enter into the market from the clinical trails due to COX-1/2 inhibition-associated side effects. Hence, targeting microsomal prostaglandin E synthase-1 (mPGES-1) and 5-LOX can be an ideal approach while sparing COX-1/2 activities for development of the next generation of anti-inflammatory drugs with better efficacy and safety.Materials and Methods: In silico (molecular modelling) studies were used to design a mPGES-1/5-LOX dual inhibitory and COX-1/2 sparing lead molecule licofelone analogue-9 (LFA-9) by modifying the pharmacophore of licofelone. In vitro cell-free enzymatic (mPGES-1, 5-LOX, COX-1/2) assays using fluorometric/colorimetric methods and cell-based assays (LPS-induced PGE2, LTB4, and PGI2 productions from macrophages) using ELISA technique, isothermal calorimetry, and circular dichroism techniques were performed to determine the mPGES-1/5-LOX inhibitory efficacy and selectivity. Anti-inflammatory efficacy of LFA-9 was evaluated using a carrageenan (inflammogen)-induced rat paw edema model. Infiltration/expression of CD68 immune cells and TNF-α in paw tissues were evaluated using confocal microscope and immunoblot analysis. Anti-cancer effect of LFA-9 was evaluated using colon spheroids in vitro.Results: LFA‐9 inhibited mPGES-1/5-LOX and their products PGE2 and LTB4, spared COX-1/2 and its product PGI2. LFA‐9 bound strongly with human mPGES‐1/5‐LOX enzymes and induced changes in their secondary structure, thereby inhibited their enzymatic activities. LFA-9 inhibited carrageenan-induced inflammation (70.4%) in rats and suppressed CD68 immune cell infiltration (P ≤ 0.0001) and TNF-α expression. LFA-9 suppressed colon tumor stemness (60.2%) in vitro through inhibition of PGE2 (82%) levels.Conclusion: Overall study results suggest that LFA-9 is a mPGES-1/5-LOX dual inhibitor and showed anti-inflammatory and colorectal cancer preventive activities, and warranted detailed studies.Keywords: mPGES-1/5-LOX dual inhibitor, LFA-9, drug design, anti-inflammatory agent, cancer chemoprevention
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- 2020
9. Additional file 1 of Elder abuse in the COVID-19 era based on calls to the National Center on Elder Abuse resource line
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Weissberger, Gali H., Lim, Aaron C., Mosqueda, Laura, Schoen, Julie, Axelrod, Jenna, Nguyen, Annie L., Wilber, Kathleen H., Esquivel, Richard S., and Han, S. Duke
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Additional file 1: Supplemental Table 1. (a) Definitions used to code calls made to the NCEA helpline. Definitions are based on CDC guidelines with some modifications. (b) Descriptions of the types of relationships coded for. Adapted from Weissberger et al. [13]. Supplemental Table 2. Breakdown of perpetrator relationships to victim separately by the four most commonly reported abuse subtypes. Some calls reported more than one relationship, thus the percentages may exceed 100% for each time period. Supplemental Table 3. Number of calls that report co-occurring subtypes for Time 1 (Panel A) and Time 2 (Panel B). Supplemental Figure 1a-d. Visual display of breakdown of perpetrator relationships to victim separately by the four most commonly reported abuse subtypes: (a) financial abuse (b) emotional abuse (c) neglect and (d) physical abuse. Some calls reported more than one relationship, thus the percentages may exceed 100% for each time period.
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- 2022
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10. Financial and health literacy discrepancies with cognition in older adults
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Gali H. Weissberger, Patricia A. Boyle, Lisa L. Barnes, David A. Bennett, Lei Yu, and S. Duke Han
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Male ,Economics ,media_common.quotation_subject ,Health literacy ,Trust ,Article ,050105 experimental psychology ,Literacy ,Odds ,Cognition ,Sex Factors ,Humans ,0501 psychology and cognitive sciences ,Aged ,media_common ,Memory and aging ,Aged, 80 and over ,Finance ,business.industry ,Information literacy ,05 social sciences ,Odds ratio ,Health Literacy ,Neuropsychology and Physiological Psychology ,Socioeconomic Factors ,Cognitive Aging ,Income ,Financial literacy ,Female ,Information Literacy ,Psychology ,business - Abstract
OBJECTIVE: Greater financial and health literacy are associated with better cognition; however, research suggests that some individuals exhibit differences, or discrepancies, in these abilities in old age. We investigated discrepancies between literacy and cognition and factors associated with such discrepancies in older adults without dementia. METHOD: Participants (N=714; age: M=81.4; education: M=15.4; 75.4% female; 5.2% non-white) from the Rush Memory and Aging Project completed cognitive assessments and a financial and health literacy measure that yielded a total literacy score. Participants were characterized into three groups: 1) total literacy scores that are more than one standard deviation (1SD) above cognition (L>C); 2) total literacy scores falling more than 1SD below cognition (LC group (OR=2.32, 95% CI=1.33–4.03, p=0.003) and lower odds of being in the LC OR=0.86, 95% CI=0.76–0.96, p=0.007), and higher trust was associated with lower odds of being in the L>C group (OR=0.92, 95% CI=0.85–0.99, p=0.030). CONCLUSIONS: Findings support literacy and cognition as partially dissociable constructs and highlight important factors associated with discrepancies between literacy and cognition.
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- 2019
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11. Physical and mental health correlates of perceived financial exploitation in older adults: Preliminary findings from the Finance, Cognition, and Health in Elders Study (FINCHES)
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Gali H. Weissberger, Annie L. Nguyen, Laura Mosqueda, Anya Samek, Caroline P. Nguyen, S. Duke Han, and Patricia A. Boyle
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Aging ,Anxiety ,Article ,03 medical and health sciences ,Cognition ,0302 clinical medicine ,Risk Factors ,biology.animal ,Humans ,Cognitive impairment ,Finch ,Aged ,Finance ,030214 geriatrics ,biology ,business.industry ,Physical health ,Mental health ,Psychiatry and Mental health ,Mental Health ,Geriatrics and Gerontology ,Pshychiatric Mental Health ,Psychology ,business ,Gerontology ,030217 neurology & neurosurgery - Abstract
OBJECTIVES: Financial exploitation (FE) in old age is poorly understood, particularly among those without significant cognitive impairment. The Finance, Cognition, and Health in Elders Study (FINCHES) aims to identify factors associated with FE among cognitively-healthy older adults. Preliminary findings regarding physical and mental health correlates in the pilot phase of FINCHES are reported. METHOD: Sixteen older adults who self-reported FE were demographically-matched on age, education, sex, and race/ethnicity to eighteen older adults who did not report past FE. RESULTS: Those who believed they were exploited endorsed significantly greater symptoms of depression (p = 0.014) and marginally greater symptoms of anxiety (p = 0.062). Participants trended towards lower perceived successful aging (p = 0.094). Perceived FE participants also endorsed greater medical conditions (p = 0.047), but follow-up individual item analyses suggest that this was driven by problems with sleep (p = 0.030). CONCLUSIONS: These preliminary findings from the pilot phase of FINCHES highlight negative mental health factors associated with perceived FE among cognitively-intact older adults.
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- 2019
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12. Cognitive and neuroimaging correlates of financial exploitation vulnerability in older adults without dementia: Implications for early detection of Alzheimer’s disease
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Laura, Fenton, Gali H, Weissberger, Patricia A, Boyle, Laura, Mosqueda, Hussein N, Yassine, Annie L, Nguyen, Aaron C, Lim, and S Duke, Han
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Behavioral Neuroscience ,Cognition ,Neuropsychology and Physiological Psychology ,Alzheimer Disease ,Cognitive Neuroscience ,Humans ,Cognitive Dysfunction ,Neuroimaging ,Neuropsychological Tests ,Aged - Abstract
Neuropathology characteristic of Alzheimer's disease (AD) begins to accumulate years to decades before cognitive changes are clinically detectable on standard neuropsychological tests. This presents a challenge for early intervention efforts and has spurred research on the identification of behavioral correlates of early neuropathological changes. Recent evidence suggests that financial exploitation vulnerability (FEV) due to impaired decision making may serve as an early behavioral manifestation of AD neuropathology, thereby indicating an increased likelihood for subsequent cognitive decline. An understanding of the underlying mechanisms of FEV is therefore warranted for the identification of individuals at risk for cognitive decline due to AD, and for empowering and protecting older adults vulnerable to financial exploitation. In the current review, we first highlight the devastating consequences of financial exploitation of older adults. We then summarize research on the cognitive, neuroimaging, and neuropathological correlates of FEV in older adults without dementia and propose a theoretical model in which early accumulation of AD pathology manifests as FEV. We conclude with clinical implications and directions for future research.
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- 2022
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13. Perceived Types, Causes, and Consequences of Financial Exploitation: Narratives From Older Adults
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Gali H. Weissberger, S. Duke Han, Laura Mosqueda, Jenna Axelrod, Nikki Windisch, and Annie L. Nguyen
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Male ,Social Psychology ,media_common.quotation_subject ,Wage ,Theft ,Interpersonal communication ,Elder Abuse ,03 medical and health sciences ,0302 clinical medicine ,030502 gerontology ,Risk Factors ,Perception ,Humans ,Narrative ,Crime Victims ,media_common ,THE JOURNAL OF GERONTOLOGY: Social Sciences ,Aged ,Finance ,Aged, 80 and over ,030214 geriatrics ,business.industry ,Fraud ,Cognition ,Elder abuse ,United States ,Clinical Psychology ,Socioeconomic Factors ,Geriatrics and Gerontology ,Thematic analysis ,Element (criminal law) ,0305 other medical science ,business ,Psychology ,Gerontology - Abstract
Objectives The goal of this study was to investigate the perception of financial exploitation and its causes and consequences by older adults who have firsthand experience of being exploited. Method Thirty-one cognitively healthy older adult participants aged 50 or older were drawn from the Finance, Cognition, and Health in Elders Study. In-depth, one-on-one interviews were conducted. Interview transcripts were analyzed using an iterative, data-driven, thematic coding scheme and emergent themes were summarized. Results Categories of financial exploitation included (a) investment fraud, (b) wage theft/money owed, (c) consumer fraud, (d) imposter schemes, and (e) manipulation by a trusted person. Themes emerged around perceived causes: (a) element of trust, (b) promise of financial security, (c) lack of experience or awareness, (d) decision-making, and (e) interpersonal dynamics. Perceived consequences included negative and positive impacts around (a) finances, (b) financial/consumer behaviors (c) relationships and trust, (d) emotional impact, and (e) future outlook. Discussion These narratives provide important insights into perceived financial exploitation experiences.
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- 2021
14. Functional Connectivity Correlates of Perceived Financial Exploitation in Older Adults
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Gali H. Weissberger, Laura Mosqueda, Annie L. Nguyen, Jenna Axelrod, Caroline P. Nguyen, Patricia A. Boyle, Nathan Spreng, and S. Duke Han
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0301 basic medicine ,Cingulate cortex ,Aging ,hippocampus ,Cognitive Neuroscience ,Hippocampus ,medial frontal cortex ,insula ,decision making ,lcsh:RC321-571 ,03 medical and health sciences ,0302 clinical medicine ,Gyrus ,Social cognition ,medicine ,lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry ,financial exploitation ,older adults ,Original Research ,Finance ,Resting state fMRI ,business.industry ,functional connectivity ,Dorsolateral prefrontal cortex ,030104 developmental biology ,medicine.anatomical_structure ,Orbitofrontal cortex ,Psychology ,business ,Insula ,030217 neurology & neurosurgery ,resting-state fMRI ,Neuroscience - Abstract
Financial exploitation (FE) in old age is devastating and common; however, the neural correlates of FE are poorly understood. Previous studies of FE in older adults have implicated declines in decision making and social cognition as two risk factors for FE in later life. Here we examined whether functional connectivity among brain regions implicated in decision making and social cognition differed for those with an experience of FE vs. those without. Participants included 16 older adults without cognitive impairment who reported FE (Mean age = 70.5, 62.5% female, Mean education = 16.0 years) and 16 demographically and cognitively matched adults who denied a history of FE (Mean age = 65.1, 37.5% female, Mean education = 15.1 years). Measures of whole-brain resting-state functional connectivity in the hippocampus, insula, and medial frontal cortex were derived for each group. Compared to the non-FE group, FE was associated with greater functional connectivity between the right hippocampus and bilateral temporal regions, and less functional connectivity between the right hippocampus and the right cerebellum and bilateral lingual gyri. The FE group showed less connectivity between the right and left insula and cingulate cortex, and between the right insula and regions of the left lateral temporal gyrus and dorsolateral prefrontal cortex. Finally, the FE group showed greater functional connectivity between the medial frontal cortex and the right lateral temporal gyrus and orbitofrontal cortex, and less functional connectivity with the right pre- and postcentral gyri. Results suggest that perceived FE in old age is associated with whole-brain functional connectivity differences involving the hippocampus, insula, and medial frontal cortex, consistent with models implicating age-associated changes in decision making and social cognition in FE.
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- 2020
15. Impact of Early Life Socioeconomic Status on Decision Making in Older Adults Without Dementia
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Lisa L. Barnes, Gali H. Weissberger, Melissa Lamar, Patricia A. Boyle, David A. Bennett, Lei Yu, and S. Duke Han
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Gerontology ,Adult ,Male ,Aging ,Health (social science) ,media_common.quotation_subject ,Decision Making ,Health literacy ,Literacy ,Article ,03 medical and health sciences ,0302 clinical medicine ,Cognition ,Alzheimer Disease ,Health care ,medicine ,Dementia ,Humans ,030212 general & internal medicine ,Socioeconomic status ,media_common ,Memory and aging ,Aged ,Aged, 80 and over ,030214 geriatrics ,business.industry ,medicine.disease ,Cross-Sectional Studies ,Social Class ,Cohort ,Female ,Geriatrics and Gerontology ,business ,Psychology - Abstract
Objectives A growing body of evidence points to the negative impact of early life socioeconomic status (SES) on health and cognitive outcomes in later life. However, the effect of early life SES on decision making in old age is not well understood. This study investigated the association of early life SES with decision making in a large community-based cohort of older adults without dementia from the Rush Memory and Aging Project. Materials and Methods Cross-sectional data from the Rush Alzheimer's Disease Center Memory and Aging Project was analyzed. Participants were 1044 community-dwelling older adults without dementia (M age = 81.15, SD = 7.49; 75.8% female; 5.4% non-White). Measures of financial and healthcare decision making and early life SES were collected, along with demographics, global cognition, and financial and health literacy. Results Early life SES was positively associated with decision making (estimate = 0.218, p = 0.027), after adjustments for demographic covariates and global cognition, such that a one-unit increase in early life SES was equivalent to the effect of being four years younger in age as it pertains to decision making. A subsequent model demonstrated that the relationship was strongest in those with low literacy, and weakest for those with high literacy (estimate = -0.013, p = 0.029). Conclusions Findings from this study suggest that early life SES is associated with late life decision making and that improving literacy, a modifiable target for intervention, may buffer the negative impact of low early life SES on decision making in older adulthood.
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- 2020
16. Neuropsychological Deficit Profiles, Vascular Risk Factors, and Neuropathological Findings in Hispanic Older Adults with Autopsy-Confirmed Alzheimer’s Disease
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Douglas Galasko, David P. Salmon, Tamar H. Gollan, Daniel A. Nation, Mark W. Bondi, Lawrence A. Hansen, and Gali H. Weissberger
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Male ,0301 basic medicine ,Longitudinal study ,Multilingualism ,Neuropathology ,Disease ,Neuropsychological Tests ,Article ,03 medical and health sciences ,0302 clinical medicine ,Cost of Illness ,Alzheimer Disease ,Risk Factors ,Ethnicity ,Humans ,Medicine ,Longitudinal Studies ,Vascular Diseases ,Senile plaques ,Aged ,Aged, 80 and over ,Psychiatric Status Rating Scales ,business.industry ,General Neuroscience ,Neuropsychology ,Cognition ,Hispanic or Latino ,General Medicine ,Executive functions ,Cognitive test ,Cerebral Amyloid Angiopathy ,Psychiatry and Mental health ,Clinical Psychology ,030104 developmental biology ,Female ,Autopsy ,Geriatrics and Gerontology ,business ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
This study aimed to determine if patterns of neuropsychological deficits, vascular risk factors, and neuropathology differ in Hispanic and Non-Hispanic patients with autopsy-confirmed Alzheimer’s disease (AD). Participants were enrolled in a longitudinal study at the Shiley-Marcos AD Research Center at the University of California, San Diego. Hispanic (n = 14) and Non-Hispanic (n = 20) patients with autopsy-confirmed AD who scored ≥95 on the Dementia Rating Scale (DRS) were included. Patient groups were matched on age, education, global mental status, and severity of functional decline; they were compared to Hispanic (n = 14) or Non-Hispanic (n = 20) cognitively-normal controls of similar age and education. Ethnicity (Hispanic, Non-Hispanic) by disease state (autopsy-confirmed AD or cognitively normal) comparisons were made for cognitive test performance and vascular risk factors. Patient groups were further compared on measures of AD (Braak stage, neuritic plaques, neurofibrillary tangles), vascular neuropathology, and performance across cognitive domains of memory, language, attention, executive functions, and visuospatial abilities after scores were z-transformed based on respective culturally-appropriate control groups. Patient groups had similar overall AD pathology burden, whereas Hispanics with AD had more small parenchymal arteriolar disease and amyloid angiopathy than Non-Hispanics with AD. Despite largely similar pathology, Hispanics with AD were less cognitively impaired (relative to respective NC groups) than Non-Hispanics with AD, and exhibited a different pattern of deficits across cognitive domains. Findings suggest that cognitive deficits that are usually prominent in AD may be less salient in Hispanic patients and this may adversely impact the ability to clinically detect the disease in mild to moderate stages.
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- 2019
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17. Alterations to task positive and task negative networks during executive functioning in Mild Cognitive Impairment
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Amy M. Jimenez, Stacy Schantz Wilkins, Gali H. Weissberger, Hannah Riskin-Jones, David L. Sultzer, Rebecca J. Melrose, Arpi S. Hasratian, and Joseph Veliz
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Male ,Aging ,Neurodegenerative ,Neuropsychological Tests ,Alzheimer's Disease ,Prefrontal cortex ,lcsh:RC346-429 ,Task (project management) ,Executive Function ,0302 clinical medicine ,80 and over ,Cognitive impairment ,Default mode network ,Aged, 80 and over ,Brain Mapping ,05 social sciences ,Brain ,Regular Article ,Middle Aged ,Magnetic Resonance Imaging ,Mental Health ,Memory, Short-Term ,Neurology ,Left prefrontal cortex ,lcsh:R858-859.7 ,Female ,Psychology ,Cognitive Neuroscience ,lcsh:Computer applications to medicine. Medical informatics ,Basic Behavioral and Social Science ,behavioral disciplines and activities ,050105 experimental psychology ,03 medical and health sciences ,Memory ,Clinical Research ,Behavioral and Social Science ,Biological neural network ,Acquired Cognitive Impairment ,Humans ,0501 psychology and cognitive sciences ,Radiology, Nuclear Medicine and imaging ,Cognitive Dysfunction ,lcsh:Neurology. Diseases of the nervous system ,Aged ,Neural correlates of consciousness ,Working memory ,Neurosciences ,Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD) ,Mild cognitive impairment ,Brain Disorders ,Short-Term ,Dementia ,Neurology (clinical) ,Nerve Net ,Executive functioning ,Neuroscience ,human activities ,030217 neurology & neurosurgery - Abstract
Poor executive functioning increases risk of decline in Mild Cognitive Impairment (MCI). Executive functioning can be conceptualized within the framework of working memory. While some components are responsible for maintaining representations in working memory, the central executive is involved in the manipulation of information and creation of new representations. We aimed to examine the neural correlates of these components of working memory using a maintenance working memory and visuospatial reasoning task. Twenty-five patients with amnestic MCI and 19 elderly controls (EC) completed functional MRI during reasoning and maintenance working memory tasks. In MCI, maintenance working memory was associated with hypoactivation of right frontoparietal regions and hyperactivation of left prefrontal cortex, coupled with attenuation of default mode network (DMN) relative to EC. During reasoning, MCI showed hypoactivation of parietal regions, coupled with attenuation of anterior DMN and increased deactivation of posterior DMN relative to EC. Comparing the reasoning task to the maintenance working memory task yields the central executive. In MCI, the central executive showed hypoactivation of right parietal lobe and increased deactivation of posterior DMN compared to EC. Consistent with prior work on executive functioning, MCI show different neural circuitry during visuospatial reasoning, including changes to both task positive frontoparietal regions, as well as to deactivation patterns within the DMN. Both hyperactivation of task positive networks and increased deactivation of DMN may be compensatory., Highlights • MCI show changes to task positive & negative networks during executive functioning. • MCI show hypoactivation of parietal cortex & attenuation of medial PFC deactivation. • Hypoactivation occurs in regions vulnerable to AD pathology. • MCI show hyperactivation of left PFC & more deactivation of posterior DMN. • These activity increases correlate with stronger cognition and may be compensatory.
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- 2018
18. 18 F-Fluorodeoxyglucose Positron Emission Tomography Cortical Metabolic Activity Associated with Distinct Agitation Behaviors in Alzheimer Disease
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Dylan G. Harwood, M. Mandelkern, Rebecca J. Melrose, David L. Sultzer, Gali H. Weissberger, and Theresa A. Narvaez
- Subjects
Cingulate cortex ,medicine.medical_specialty ,030214 geriatrics ,Aggression ,media_common.quotation_subject ,Hostility ,Anger ,Irritability ,medicine.disease ,Euphoriant ,03 medical and health sciences ,Psychiatry and Mental health ,0302 clinical medicine ,Disinhibition ,medicine ,Geriatrics and Gerontology ,medicine.symptom ,Alzheimer's disease ,Psychiatry ,Psychology ,030217 neurology & neurosurgery ,media_common - Abstract
Objective This study aimed to investigate the neurobiologic correlates of two distinct clusters of agitation symptoms to identify the unique biologic substrates underlying agitated behaviors. Methods Eighty-eight outpatients with mild to moderate Alzheimer disease (AD) were recruited from the VA Greater Los Angeles Healthcare System Geropsychiatry Outpatient Program. A cross-sectional investigation was conducted of the relationship between cerebral glucose metabolism measured via 18 F-fluorodeoxyglucose positron emission tomography and agitated symptoms from the Neuropsychiatric Inventory (NPI) in patients with AD. Two empirically derived clusters of agitation symptoms were investigated: an Agitation factor comprising agitation/aggression and irritability/lability items of the NPI, and a Behavioral Dyscontrol factor comprising elation/euphoria, disinhibition, aberrant motor behavior, sleep, and appetite items of the NPI. Mean cerebral metabolism for patients who scored positively on each of the two factors was compared with mean cerebral metabolism for those who did not. Results Patients with AD who scored positively on the Agitation factor showed reduced glucose metabolism of the right temporal, right frontal, and bilateral cingulate cortex. In contrast, the Behavioral Dyscontrol factor did not show specific neurobiologic correlates. Conclusion Symptoms encompassed within the Agitation factor have distinct neurobiologic underpinnings. The precipitants, course, and outcomes related to these symptoms may be unique from other neuropsychiatric symptoms characteristic of AD. Special attention to treatment of agitated behaviors involving anger, aggressiveness, hostility, and irritability/emotional lability is warranted, because they appear to reflect a clinically relevant symptom cluster with unique underlying neurobiologic correlates.
- Published
- 2017
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19. Elder Abuse Characteristics Based on Calls to the National Center on Elder Abuse (NCEA) Resource Line
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Julie Schoen, Caroline P. Nguyen, Morgan C Goodman, Zachary D. Gassoumis, Laura Mosqueda, S. Duke Han, Gali H. Weissberger, Annie L. Nguyen, and Kathleen H. Wilber
- Subjects
medicine.medical_specialty ,Resource (biology) ,Financial abuse ,Elder abuse ,Elder Abuse ,Article ,Aggression ,03 medical and health sciences ,0302 clinical medicine ,Physical abuse ,Physical Abuse ,medicine ,Humans ,Observational study ,030212 general & internal medicine ,Geriatrics and Gerontology ,Psychology ,Psychiatry ,Gerontology ,030217 neurology & neurosurgery ,Aged - Abstract
Characterizing the types of elder abuse and identifying the characteristics of perpetrators are critically important. This study examined the types of elder abuse reported to the National Center on Elder Abuse (NCEA) resource line. Calls were coded with regard to whether abuse was reported, types of abuse alleged, whether multiple abuse subtypes occurred, and who perpetrated the alleged abuse. Of the 1,939 calls, 818 (42.2%) alleged abuse, with financial abuse being the most commonly reported (449 calls, 54.9%). A subset of calls identified multiple abuse types (188, 23.0%) and multiple abusers (149, 18.2%). Physical abuse was most likely to co-occur with another abuse type (61/93 calls, 65.6%). Family members were the most commonly identified perpetrators (309 calls, 46.8%). This study reports the characteristics of elder abuse from a unique source of frontline data, the NCEA resource line. Findings point to the importance of supportive resources for elder abuse victims and loved ones.
- Published
- 2019
20. Insular and Hippocampal Connectivity Is Associated With Perceived Financial Exploitation in Older Adults
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Nathan Spreng, Laura Mosqueda, Gali H. Weissberger, Annie L. Nguyen, Duke Han, Jenna Axelrod, and Patricia A. Boyle
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Gerontology ,Abstracts ,Health (social science) ,nervous system ,Biobehavioral Health ,Hippocampal formation ,Life-span and Life-course Studies ,Psychology ,Session 3015 (Paper) ,AcademicSubjects/SOC02600 ,Health Professions (miscellaneous) - Abstract
Little is known about the neural correlates of financial exploitation (FE) in older adults. Cognitively-intact older adults who self-reported a history of FE (N=19; M age=69.84, SD=13.06) and demographically-matched non-FE older adults (N=16; M age=65.13, SD=8.48) underwent resting-state fMRI. Predefined regions of interest were prescribed using the Harvard-Oxford atlas for their involvement in tasks of economic decision making: insula, hippocampus, and the medial prefrontal cortex (mPFC). Analyses adjusted for age, education, sex, and MoCA scores; groups did not differ on these factors. Clusters were FDR-corrected with a threshold of p
- Published
- 2020
21. Neuropsychological Deficit Profiles, Vascular Risk Factors, and Neuropathological Findings in Hispanic Older Adults with Autopsy-Confirmed Alzheimer's Disease
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Weissberger, Gali H, Gollan, Tamar H, Bondi, Mark W, Nation, Daniel A, Hansen, Lawrence A, Galasko, Douglas, and Salmon, David P
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Male ,Aging ,Hispanics ,Clinical Sciences ,neuropsychology ,Multilingualism ,Neuropsychological Tests ,Neurodegenerative ,Alzheimer's Disease ,autopsy ,Cost of Illness ,Alzheimer Disease ,Risk Factors ,Clinical Research ,Behavioral and Social Science ,80 and over ,Ethnicity ,Acquired Cognitive Impairment ,Humans ,2.1 Biological and endogenous factors ,Vascular Diseases ,Longitudinal Studies ,Aetiology ,Aged ,Psychiatric Status Rating Scales ,Neurology & Neurosurgery ,Prevention ,Neurosciences ,Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD) ,Hispanic or Latino ,bilingualism ,Brain Disorders ,Cerebral Amyloid Angiopathy ,Neurological ,Female ,Dementia ,Cognitive Sciences ,Alzheimer’s disease - Abstract
This study aimed to determine if patterns of neuropsychological deficits, vascular risk factors, and neuropathology differ in Hispanic and Non-Hispanic patients with autopsy-confirmed Alzheimer's disease (AD). Participants were enrolled in a longitudinal study at the Shiley-Marcos AD Research Center at the University of California, San Diego. Hispanic (n = 14) and Non-Hispanic (n = 20) patients with autopsy-confirmed AD who scored ≥95 on the Dementia Rating Scale (DRS) were included. Patient groups were matched on age, education, global mental status, and severity of functional decline; they were compared to Hispanic (n = 14) or Non-Hispanic (n = 20) cognitively-normal controls of similar age and education. Ethnicity (Hispanic, Non-Hispanic) by disease state (autopsy-confirmed AD or cognitively normal) comparisons were made for cognitive test performance and vascular risk factors. Patient groups were further compared on measures of AD (Braak stage, neuritic plaques, neurofibrillary tangles), vascular neuropathology, and performance across cognitive domains of memory, language, attention, executive functions, and visuospatial abilities after scores were z-transformed based on respective culturally-appropriate control groups. Patient groups had similar overall AD pathology burden, whereas Hispanics with AD had more small parenchymal arteriolar disease and amyloid angiopathy than Non-Hispanics with AD. Despite largely similar pathology, Hispanics with AD were less cognitively impaired (relative to respective NC groups) than Non-Hispanics with AD, and exhibited a different pattern of deficits across cognitive domains. Findings suggest that cognitive deficits that are usually prominent in AD may be less salient in Hispanic patients and this may adversely impact the ability to clinically detect the disease in mild to moderate stages.
- Published
- 2019
22. ELDER ABUSE SUBTYPES REPORTED TO THE NATIONAL CENTER ON ELDER ABUSE
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M Goodman, Laura Mosqueda, Duke Han, Gali H. Weissberger, Caroline P. Nguyen, and J Schoen
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medicine.medical_specialty ,Abstracts ,Health (social science) ,Family medicine ,medicine ,Center (algebra and category theory) ,Elder abuse ,Life-span and Life-course Studies ,Psychology ,Health Professions (miscellaneous) - Abstract
This study examined the frequency of six types of elder abuse and types of abuser-victim relationships identified from calls to the National Center on Elder Abuse call center (NCEA-CC) between 08/2014-06/2017. The NCEA-CC receives calls from individuals seeking assistance in reporting incidents or requesting general information on elder abuse. Calls were classified into six subtypes (financial, physical, sexual, emotional, neglect, and self-neglect) using the Center for Disease Control’s uniform definitions for elder abuse. Frequencies of elder abuse subtype and abuser-victim relationship data were coded. We identified 775 calls (664 specified abuse subtype; 616 specified relationship) alleging elder abuse. Abuse subtype was coded in the following frequencies: financial (63.3%), emotional (27%), neglect (23.6%), physical (10.4%), sexual (1.4%), and self-neglect (1.1%). Abuse by a family member was most frequently alleged (49%), followed by abuse by a medical caretaker (20.1%), a non-caretaker acquaintance (16.7%), a stranger (7.8%), a non-medical caretaker (5.2%), and self-neglect (1.1%). The most commonly alleged abuse type by a family member was financial (67%). Results indicate that financial abuse is the most commonly alleged form of elder abuse to the NCEA-CC, and suggest a family member might be likely to commit this type of abuse. This supports findings from a large survey study that found financial mistreatment by family to be the most prevalent form of abuse, but is contrary to another study that found emotional abuse by family to be most prevalent. Different methodological approaches could account for divergent findings across studies.
- Published
- 2018
23. Neuropsychological case report of MCI reversion at one-year follow-up
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Caroline T. Nguyen, Duke Han, Gali H. Weissberger, and Katherine Gibson
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Male ,California Verbal Learning Test ,Neuropsychology clinic ,One year follow up ,Remission, Spontaneous ,Neuropsychology ,Cognition ,Context (language use) ,03 medical and health sciences ,0302 clinical medicine ,Neuropsychology and Physiological Psychology ,Mood ,Developmental and Educational Psychology ,Humans ,Cognitive Dysfunction ,030212 general & internal medicine ,Cognitive skill ,Amnesia ,Psychology ,030217 neurology & neurosurgery ,Clinical psychology ,Aged ,Follow-Up Studies - Abstract
This report presents the neuropsychological profile of an older gentleman diagnosed with single-domain mild cognitive impairment (MCI) at baseline who reverted to normal cognitive functioning at 1-year follow-up. The case highlights important considerations for assessing and diagnosing MCI in clinical settings in the context of sizeable reversion rates that have been reported extensively in the literature. A 72-year-old gentleman presented to our Neuropsychology Clinic with subjective memory complaints. Per recommendation, the patient returned for follow-up testing 1-year later. A clinical interview, comprehensive battery of neuropsychological tests, and mood questionnaires were administered during both evaluations. At baseline, DSM-5 Mild Neurocognitive Disorder consistent with single-domain amnestic MCI was diagnosed based on several impaired scores on the California Verbal Learning Test, 2nd version (CVLT-II) and collateral report of subtle decline in functioning. At follow-up, all cognitive performances fell within normal limits. The patient no longer met criteria for Mild Neurocognitive Disorder. The present case study highlights important considerations when assessing and diagnosing MCI in the clinical setting. Repeat testing in clinical settings is underscored by the sizeable rate of MCI reversion reported in the literature. Important diagnostic and feedback considerations are discussed.
- Published
- 2018
24. Meta-analysis of cognitive ability differences by apolipoprotein e genotype in young humans
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Daniel A. Nation, Caroline P. Nguyen, Gali H. Weissberger, Mark W. Bondi, and S. Duke Han
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Apolipoprotein E ,Aging ,Cognitive Neuroscience ,PRISMA ,Behavioral Science & Comparative Psychology ,Basic Behavioral and Social Science ,Medical and Health Sciences ,050105 experimental psychology ,Article ,Executive functions ,03 medical and health sciences ,Behavioral Neuroscience ,0302 clinical medicine ,Apolipoproteins E ,Cognition ,Pleiotropy ,Neuropsychology ,Behavioral and Social Science ,Genetics ,Acquired Cognitive Impairment ,Humans ,0501 psychology and cognitive sciences ,Allele ,Working memory ,05 social sciences ,Psychology and Cognitive Sciences ,Neurosciences ,Alzheimer's disease ,Brain Disorders ,Neuropsychology and Physiological Psychology ,Mental Health ,Meta-analysis ,Psychology ,Alzheimer’s disease ,Mind and Body ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
The apolipoprotein (APOE) e4 allele has been proposed as an example of an antagonistic pleiotropy gene, conferring a beneficial effect on cognition in early life and a detrimental impact on cognition during later years. However, findings on the cognitive associations of the e4 allele in younger persons are mixed. This PRISMA conforming study aimed to investigate APOE genotype (e4/non-e4) associations across seven cognitive domains (intelligence/achievement, attention/working memory, executive functioning, memory, language, processing speed and visuospatial abilities) in younger humans using a meta-analytic approach. Of 689 records reviewed, 29 studies (34 data-points) were selected for the quantitative synthesis. Participants’ ages ranged from 2-40. Results showed that young e4 carriers did not statistically differ from non-e4 carriers across any cognitive domains. Overall, findings do not provide compelling support for an antagonistic pleiotropic effect of the e4 allele across the lifespan.
- Published
- 2018
25. Faulty Adaptation to Repeated Face-Name Associative Pairs in Mild Cognitive Impairment is Predictive of Cognitive Decline
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Jurick, Sarah M, Weissberger, Gali H, Clark, Lindsay R, Wierenga, Christina E, Chang, Yu-Ling, Schiehser, Dawn M, Han, S Duke, Jak, Amy J, Dev, Sheena I, and Bondi, Mark W
- Subjects
Male ,Aging ,Image Processing ,Neuropsychological Tests ,Neurodegenerative ,Alzheimer's Disease ,Computer-Assisted ,Clinical Research ,Behavioral and Social Science ,80 and over ,Acquired Cognitive Impairment ,Humans ,Names ,Psychology ,Functional neuroimaging ,Adaptation ,Aged ,Neurosciences ,Association Learning ,Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD) ,Mild cognitive impairment ,Magnetic Resonance Imaging ,Brain Disorders ,Oxygen ,Recognition ,Clinical Psychology ,Face ,Regression Analysis ,Psychological ,Female ,Dementia ,Mental health ,Cognitive Sciences ,Cognition Disorders - Abstract
ObjectiveWe examined BOLD (Blood-Oxygen-Level Dependent) activity reduction upon stimuli repetition of face-name pairs in older adults with amnestic (aMCI) and non-amnestic (naMCI) mild cognitive impairment diagnosed using a comprehensive actuarial method, and relationships between activity reduction and behavioral indices.MethodTwenty-nine cognitively healthy older adults (CHs) and 20 with MCI (n = 12 aMCI; n = 8 naMCI) underwent functional MRI event-related imaging, a comprehensive neuropsychological battery, and 1-year follow-up exam. During scanning, participants were shown face-name pairs 1-3 times and administered a post-scan recognition task.ResultsThe MCI group demonstrated less activity reduction upon repetition of face-name pairs within the MTL and other regions compared to CHs. Less activity reduction was associated with poorer Time 1 neuropsychological performance for the CH group and poorer post-scan recognition performance for the MCI group. Less activity reduction was related to poorer neuropsychological performance at Time 2 in the MCI group. Within MCIs, those with aMCI demonstrated less activity reduction upon repetition of face-name pairs than those with naMCI.ConclusionsDistinct patterns of brain activity were identified in the MCI group compared to CHs, and aMCI compared to naMCI. Activated regions were not restricted to traditional memory circuitry, implicating a wider network of regions involved in the encoding of associative tasks. Findings add support to the hypothesis that lack of reduced BOLD activity reflects "faulty adaptation" to repeated stimuli and that reduction in activity represents successful encoding processes. They also provide further support for use of the face-name paradigm as a marker of prodromal Alzheimer's disease, and method to distinguish between MCI subtypes.
- Published
- 2018
26. Language and task switching in the bilingual brain: Bilinguals are staying, not switching, experts
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Tamar H. Gollan, Lindsay R. Clark, Gali H. Weissberger, Mark W. Bondi, and Christina E. Wierenga
- Subjects
Adult ,Male ,Task switching ,Cognitive Neuroscience ,Multilingualism ,Experimental and Cognitive Psychology ,Article ,Task (project management) ,Developmental psychology ,Executive Function ,Young Adult ,Behavioral Neuroscience ,medicine ,Humans ,Control (linguistics) ,Neuroscience of multilingualism ,Brain Mapping ,Neural correlates of consciousness ,medicine.diagnostic_test ,Brain ,Magnetic Resonance Imaging ,Language control ,Female ,Functional magnetic resonance imaging ,Psychology ,Neurocognitive ,Cognitive psychology - Abstract
Bilinguals' ability to control which language they speak and to switch between languages may rely on neurocognitive mechanisms shared with non-linguistic task switching. However, recent studies also reveal some limitations on the extent control mechanisms are shared across domains, introducing the possibility that some control mechanisms are unique to language. We investigated this hypothesis by directly comparing the neural correlates of task switching and language switching. Nineteen Spanish–English bilingual university students underwent a functional magnetic resonance imaging (fMRI) study employing a hybrid (event-related and blocked) design involving both color-shape switching and language switching paradigms. We compared the two switching tasks using within-subject voxel-wise t -tests for each of three trial types (single trials in single blocks, and stay and switch trials in mixed blocks). Comparing trial types to baseline in each task revealed widespread activation for single, stay, and switch trials in both color-shape and language switching. Direct comparisons of each task for each trial type revealed few differences between tasks on single and switch trials, but large task differences during stay trials, with more widespread activation for the non-linguistic than for the language task. Our results confirm previous suggestions of shared mechanisms of switching across domains, but also reveal bilinguals have greater efficiency for sustaining the inhibition of the non-target language than the non-target task when two responses are available. This efficiency of language control might arise from bilinguals' need to control interference from the non-target language specifically when not switching languages, when speaking in single- or mixed-language contexts.
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- 2015
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27. Cerebral metabolic correlates of attention networks in Alzheimer’s Disease: a study of the Stroop
- Author
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David L. Sultzer, Gali H. Weissberger, M. Mandelkern, Rebecca J. Melrose, Laura Natta, Dylan G. Harwood, and Stephanie Young
- Subjects
Male ,Cognitive Neuroscience ,Experimental and Cognitive Psychology ,Disease ,Cognitive neuroscience ,050105 experimental psychology ,Article ,03 medical and health sciences ,Behavioral Neuroscience ,0302 clinical medicine ,Alzheimer Disease ,Fluorodeoxyglucose F18 ,Neural Pathways ,Humans ,0501 psychology and cognitive sciences ,Attention ,Prefrontal cortex ,Aged ,Aged, 80 and over ,Cerebral Cortex ,Neural correlates of consciousness ,05 social sciences ,Middle Aged ,Positron-Emission Tomography ,Stroop Test ,Female ,Color naming ,Neuropsychological testing ,Metabolic activity ,Psychology ,030217 neurology & neurosurgery ,Cognitive psychology ,Stroop effect - Abstract
Patients with Alzheimer’s Disease (AD) show difficulties with attention. Cognitive neuroscience models posit that attention can be broken down into alerting, orienting, and executive networks. We used the Stroop Color-Word test to interrogate the neural correlates of attention deficits in AD. We hypothesized that the Word, Color, and Color-Word conditions of the Stroop would all tap into the alerting and orienting networks. The Color-Word condition would additionally tap into the executive network. A ratio of Color-Word to Color naming performance would isolate the executive network from the others. To identify the neural underpinnings of attention in AD we correlated performance on the Stroop with brain metabolic activity. Sixty-six patients with probable AD completed [18F] fluorodeoxyglucose PET scanning and neuropsychological testing. Analysis was conducted with SPM12 (p
- Published
- 2017
28. Diagnostic Accuracy of Memory Measures in Alzheimer’s Dementia and Mild Cognitive Impairment: a Systematic Review and Meta-Analysis
- Author
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Jessica V. Strong, Nikki H. Stricker, Mark W. Bondi, Kayla B. Stefanidis, Mathew J. Summers, and Gali H. Weissberger
- Subjects
050103 clinical psychology ,medicine.medical_specialty ,Context (language use) ,Neuropsychological Tests ,Article ,03 medical and health sciences ,0302 clinical medicine ,Alzheimer Disease ,Memory ,medicine ,Dementia ,Humans ,0501 psychology and cognitive sciences ,Cognitive Dysfunction ,Neuropsychological assessment ,Psychiatry ,medicine.diagnostic_test ,Recall ,05 social sciences ,Neuropsychology ,Cognition ,medicine.disease ,Neuropsychology and Physiological Psychology ,Meta-analysis ,Alzheimer's disease ,Psychology ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
With an increasing focus on biomarkers in dementia research, illustrating the role of neuropsychological assessment in detecting mild cognitive impairment (MCI) and Alzheimer's dementia (AD) is important. This systematic review and meta-analysis, conducted in accordance with PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) standards, summarizes the sensitivity and specificity of memory measures in individuals with MCI and AD. Both meta-analytic and qualitative examination of AD versus healthy control (HC) studies (n = 47) revealed generally high sensitivity and specificity (≥ 80% for AD comparisons) for measures of immediate (sensitivity = 87%, specificity = 88%) and delayed memory (sensitivity = 89%, specificity = 89%), especially those involving word-list recall. Examination of MCI versus HC studies (n = 38) revealed generally lower diagnostic accuracy for both immediate (sensitivity = 72%, specificity = 81%) and delayed memory (sensitivity = 75%, specificity = 81%). Measures that differentiated AD from other conditions (n = 10 studies) yielded mixed results, with generally high sensitivity in the context of low or variable specificity. Results confirm that memory measures have high diagnostic accuracy for identification of AD, are promising but require further refinement for identification of MCI, and provide support for ongoing investigation of neuropsychological assessment as a cognitive biomarker of preclinical AD. Emphasizing diagnostic test accuracy statistics over null hypothesis testing in future studies will promote the ongoing use of neuropsychological tests as Alzheimer's disease research and clinical criteria increasingly rely upon cerebrospinal fluid (CSF) and neuroimaging biomarkers.
- Published
- 2017
29. Faulty Adaptation to Repeated Face-Name Associative Pairs in Mild Cognitive Impairment is Predictive of Cognitive Decline
- Author
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Lindsay R. Clark, Amy J. Jak, Gali H. Weissberger, Yu-Ling Chang, S. Duke Han, Sarah M. Jurick, Sheena I. Dev, Dawn M. Schiehser, Christina E. Wierenga, and Mark W. Bondi
- Subjects
Male ,medicine.medical_specialty ,Brain activity and meditation ,Adaptation (eye) ,Audiology ,Neuropsychological Tests ,behavioral disciplines and activities ,050105 experimental psychology ,03 medical and health sciences ,0302 clinical medicine ,Text mining ,mental disorders ,Adaptation, Psychological ,medicine ,Image Processing, Computer-Assisted ,Humans ,Names ,0501 psychology and cognitive sciences ,Cognitive decline ,Associative property ,Aged ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,05 social sciences ,Neuropsychology ,Association Learning ,Magnetic resonance imaging ,Recognition, Psychology ,General Medicine ,Magnetic Resonance Imaging ,Oxygen ,Psychiatry and Mental health ,Clinical Psychology ,Neuropsychology and Physiological Psychology ,Face ,Regression Analysis ,Female ,Original Empirical Article ,Psychology ,Functional magnetic resonance imaging ,business ,Cognition Disorders ,030217 neurology & neurosurgery ,Cognitive psychology - Abstract
Objective We examined BOLD (Blood-Oxygen-Level Dependent) activity reduction upon stimuli repetition of face-name pairs in older adults with amnestic (aMCI) and non-amnestic (naMCI) mild cognitive impairment diagnosed using a comprehensive actuarial method, and relationships between activity reduction and behavioral indices. Method Twenty-nine cognitively healthy older adults (CHs) and 20 with MCI (n = 12 aMCI; n = 8 naMCI) underwent functional MRI event-related imaging, a comprehensive neuropsychological battery, and 1-year follow-up exam. During scanning, participants were shown face-name pairs 1-3 times and administered a post-scan recognition task. Results The MCI group demonstrated less activity reduction upon repetition of face-name pairs within the MTL and other regions compared to CHs. Less activity reduction was associated with poorer Time 1 neuropsychological performance for the CH group and poorer post-scan recognition performance for the MCI group. Less activity reduction was related to poorer neuropsychological performance at Time 2 in the MCI group. Within MCIs, those with aMCI demonstrated less activity reduction upon repetition of face-name pairs than those with naMCI. Conclusions Distinct patterns of brain activity were identified in the MCI group compared to CHs, and aMCI compared to naMCI. Activated regions were not restricted to traditional memory circuitry, implicating a wider network of regions involved in the encoding of associative tasks. Findings add support to the hypothesis that lack of reduced BOLD activity reflects "faulty adaptation" to repeated stimuli and that reduction in activity represents successful encoding processes. They also provide further support for use of the face-name paradigm as a marker of prodromal Alzheimer's disease, and method to distinguish between MCI subtypes.
- Published
- 2017
30. Frailty and Perceived Financial Exploitation: Findings from the Finance, Cognition, and Health in Elders Study
- Author
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S. Duke Han, Jenna Axelrod, Laura Mosqueda, Gali H. Weissberger, Emanuil Parunakian, Annie L. Nguyen, and Patricia A. Boyle
- Subjects
cognition ,Finance ,030214 geriatrics ,business.industry ,Brief Report ,Cognition ,frailty ,lcsh:Geriatrics ,Abuse/neglect ,lcsh:RC952-954.6 ,03 medical and health sciences ,0302 clinical medicine ,Intervention (counseling) ,030212 general & internal medicine ,Geriatrics and Gerontology ,ABUSE NEGLECT ,Psychology ,business - Abstract
Objective: Many older adults who are cognitively intact experience financial exploitation (FE), and the reasons for this are poorly understood. Methods: Data were gathered from 37 older adults ( M age = 69.51, M education = 15.89, 62% female) from the Finance, Cognition, and Health in Elders Study (FINCHES). Twenty-four older adults who self-reported FE were demographically-matched according to age, education, race, and MoCA performance to thirteen older adults who denied experiencing FE. Participants completed the Tilburg Frailty Inventory. Results: FE participants reported greater total frailty ( t = 2.06, p = .04) when compared to non-FE participants. Post-hoc analyses revealed that FE participants endorsed greater physical frailty ( U = 89, p = .03), specifically poorer sensory functioning (hearing and vision). Discussion: Findings suggest frailty is associated with FE in old age and may represent a target for intervention programs for the financial wellbeing of older adults.
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- 2020
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31. SC3 Final-year medical students are unreliable self-assessors even when video-playback is utilised within the self-assessment cycle during emergency simulations
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Hallikeri P, Nick Peres, Sayers J, Crowther I, Forrest I, J Matthan, Caulfield L, Anyiam O, Oates E, Gali H, McMullan M, and Rodham P
- Subjects
Medical education ,Undergraduate curriculum ,Continuing professional development ,Teaching tool ,Self ,education ,Statistical analysis ,Psychology - Abstract
Background Self-assessment is a skill required by clinicians for continuous professional development. Medical students struggle with the skill, largely due to the paucity of incorporating it into the undergraduate curriculum and the absence of a validated self-assessment cycle. Several studies suggest video-playback used in a simulated environment may be an effective learning and teaching tool. We aimed to investigate whether students’ evaluation of their performance in a simulated environment before and after video-playback correlated with those of qualified clinicians’ evaluation, and whether their self-assessment skills improved with the use of video-playback, in order to gauge the usefulness of video-playback within the self-assessment process for simulated scenarios. Methodology Consented recordings of final-year medical students (n = 90) leading an emergency simulation scenario were made over two five-month periods in 2015 and 2016. Students and assessors used identical marking schemes. Students self-assessed their performance before and after video-playback and their scores were compared against markers’ scores. Statistical analysis of data was conducted. Results 91% of students scored their performance lower than clinician assessors prior to video-playback. After video-playback, 60% demonstrated an increase in self-assessment scores, whilst 40% showed a decrease. Students continued to score themselves significantly lower than their assessors following video-playback (P Conclusions and recommendations Our results suggest that students may be able to self-assess more accurately following video-playback, although self-assessment remains challenging for a significant proportion. While the ability to self-assess improves for the majority of final-year medical students following video-playback and reassessment of their performance, they remain harsh self-assessors. Utilising video-playback for self-assessment purposes within the feedback process can only be cautiously adopted with phased, incremental and guided use of self-assessment. The development of a validated self-assessment framework is recommended before widespread use within the undergraduate curriculum.
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- 2016
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32. 15 Medical students are strategic participants in educational trials
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A Madhavan, Craig Nesbitt, Gali H, Gerard Stansby, El-Gendy K, Phillips Aw, Rodham P, Crowther I, IJ Whitehead, LR Bookless, and J Matthan
- Subjects
Medical education ,Resource (project management) ,Educational method ,Best practice ,media_common.quotation_subject ,education ,Equity (finance) ,Validity ,Thematic analysis ,Worry ,Psychology ,Curriculum ,media_common - Abstract
Background Medical educational methods have changed greatly over the last 20 years. Attempts have been made to move towards adopting more evidence-based practices. The challenges associated with recruiting suitable students and guaranteeing equity across the board, and ensuring validity and reliability of the trials, remain numerous. Medical schools may be reluctant to allow students to participate in medical education trials for fear of burdening them. This study aimed to explore the reasons why medical students partake in studies in order to inform future practice. Methodology Medical students at Newcastle Medical School were invited to participate in a study looking at video-enhanced feedback on learning cannulation, catheterisation and suturing. Participants completed a questionnaire with nine questions based on a visual analogue scale on reasons for participating. Free text reasons were also solicited and thematically analysed. Results A total of 72 responses (100%) were received. Thematic analysis revealed students (a) enjoyed practical skills, (b) felt participation would help with exams and long term career aspirations and (c) felt participation was an opportunity to learn a new skill. Pre-clinical students were more likely to attend to learn new skills, while clinical students wanted to improve weak areas or consolidate skills previously learnt (all P Conclusions and recommendations Medical students participate in educational trials for varying reasons, the driving forces of which are a genuine interest in practical procedures as well as the desire to do well in upcoming exams. Medical schools worry about overusing students in educational trials; students, however, have a genuine interest in participation and are able to be strategic. Medical students are a valuable resource in curriculum design and development and should not be overlooked when designing medical educational trials nor when considering inviting them to participate in trials aiming to evidence best practice in medical education.
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- 2016
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33. Specific Measures of Executive Function Predict Cognitive Decline in Older Adults
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Gali H. Weissberger, David P. Salmon, Lindsay R. Clark, Dean C. Delis, Dawn M. Schiehser, and Mark W. Bondi
- Subjects
Male ,Aging ,medicine.medical_specialty ,Trail Making Test ,Neuropsychological Tests ,Audiology ,Article ,Developmental psychology ,Executive Function ,Fluency ,Apolipoproteins E ,Memory ,Predictive Value of Tests ,medicine ,Humans ,Dementia ,Verbal fluency test ,Longitudinal Studies ,Cognitive decline ,Episodic memory ,Aged ,Aged, 80 and over ,General Neuroscience ,Cognition ,Executive functions ,medicine.disease ,Psychiatry and Mental health ,Clinical Psychology ,Female ,Neurology (clinical) ,Cognition Disorders ,Psychology - Abstract
Decline in executive function has been noted in the prodromal stage of Alzheimer's disease (AD) and may presage more global cognitive declines. In this prospective longitudinal study, five measures of executive function were used to predict subsequent global cognitive decline in initially nondemented older adults. Of 71 participants, 15 demonstrated significant decline over a 1-year period on the Dementia Rating Scale (Mattis, 1988) and the remaining participants remained stable. In the year before decline, the decline group performed significantly worse than the no-decline group on two measures of executive function: the Color-Word Interference Test (CWIT; inhibition/switching condition) and Verbal Fluency (VF; switching condition). In contrast, decliners and non-decliners performed similarly on measures of spatial fluency (Design Fluency switching condition), spatial planning (Tower Test), and number-letter switching (Trail Making Test switching condition). Furthermore, the CWIT inhibition-switching measure significantly improved the prediction of decline and no-decline group classification beyond that of learning and memory measures. These findings suggest that some executive function measures requiring inhibition and switching provide predictive utility of subsequent global cognitive decline independent of episodic memory and may further facilitate early detection of dementia. (JINS, 2012, 18, 118–127)
- Published
- 2011
- Full Text
- View/download PDF
34. Self-ratings of spoken language dominance: A Multilingual Naming Test (MINT) and preliminary norms for young and aging Spanish–English bilinguals
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Rosa I. Montoya, Tamar H. Gollan, Elin Runnqvist, Cynthia Cera, and Gali H. Weissberger
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Linguistics and Language ,Article ,Language and Linguistics ,Linguistics ,Education ,Test (assessment) ,Boston Naming Test ,Spanish english ,Dominance (ethology) ,Language proficiency ,Multilingualism ,Psychology ,Neuroscience of multilingualism ,Spoken language ,Cognitive psychology - Abstract
This study investigated correspondence between different measures of bilingual language proficiency contrasting self-report, proficiency interview, and picture naming skills. Fifty-two young (Experiment 1) and 20 aging (Experiment 2) Spanish–English bilinguals provided self-ratings of proficiency level, were interviewed for spoken proficiency, and named pictures in a Multilingual Naming Test (MINT); in Experiment 1, the Boston Naming Test (BNT) was also used. Self-ratings, proficiency interview, and the MINT did not differ significantly in classifying bilinguals into language-dominance groups, but naming tests (especially the BNT) classified bilinguals as more English-dominant than other measures. Strong correlations were observed between measures of proficiency in each language and language-dominance, but not degree of balanced bilingualism (index scores). Depending on the measure, up to 60% of bilinguals scored best in their self-reported non-dominant language. The BNT distorted bilingual assessment by underestimating ability in Spanish. These results illustrate what self-ratings can and cannot provide, illustrate the pitfalls of testing bilinguals with measures designed for monolinguals, and invite a multi-measure goal-driven approach to classifying bilinguals into dominance groups.
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- 2011
- Full Text
- View/download PDF
35. Aggregate effects of vascular risk factors on cerebrovascular changes in autopsy-confirmed Alzheimer's disease
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Bangen, Katherine J, Nation, Daniel A, Delano-Wood, Lisa, Weissberger, Gali H, Hansen, Lawrence A, Galasko, Douglas R, Salmon, David P, and Bondi, Mark W
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Adult ,Male ,Aging ,Clinical Sciences ,Blood Pressure ,Neurodegenerative ,Cardiovascular ,Alzheimer's Disease ,Alzheimer Disease ,Risk Factors ,Vascular Cognitive Impairment/Dementia ,80 and over ,Acquired Cognitive Impairment ,Humans ,2.1 Biological and endogenous factors ,Aetiology ,Cerebrovascular disease ,Neuropathology ,Aged ,Neurologic Examination ,Psychiatric Status Rating Scales ,Prevention ,Smoking ,Neurosciences ,Brain ,Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD) ,Middle Aged ,Alzheimer's disease ,Atherosclerosis ,Brain Disorders ,Stroke ,Cardiovascular Diseases ,Geriatrics ,Neurological ,Female ,Dementia ,Autopsy ,Vascular risk - Abstract
We examined the relationships of antemortem vascular risk factors to postmortem cerebrovascular and Alzheimer's disease (AD) pathologies. Eighty-four AD patients underwent an assessment of vascular risk (blood pressure, cholesterol, smoking, cardiovascular disease, diabetes, atrial fibrillation, transient ischemic attack [TIA], or stroke) and later underwent brain autopsy. Given our aim to examine mild cerebrovascular changes (CVCs), individuals were excluded if autopsy revealed large stroke. The most common forms of CVC were circle of Willis atherosclerosis followed by arteriosclerosis, lacunes, and microinfarcts. Excluding the history of TIA/clinical stroke, individual vascular risk factors were not associated with CVC. However, the presence of multiple vascular risk factors was associated with CVC. Furthermore, the presence of CVC was associated with lower Braak and Braak stage. These findings highlight the importance of aggregate risk in the vascular contribution to dementia. Interventions designed to maintain cerebrovascular health may represent important opportunities for preventing or delaying dementia, even when AD is the dominant pathology.
- Published
- 2015
36. Language and task switching in the bilingual brain: Bilinguals are staying, not switching, experts
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Weissberger, Gali H, Gollan, Tamar H, Bondi, Mark W, Clark, Lindsay R, and Wierenga, Christina E
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Adult ,Male ,Brain Mapping ,Task switching ,Bilingualism ,fMRI ,Clinical Trials and Supportive Activities ,Neurosciences ,Brain ,Multilingualism ,Experimental Psychology ,Linguistic control ,Magnetic Resonance Imaging ,Executive control ,Young Adult ,Executive Function ,Clinical Research ,Humans ,Psychology ,Female ,Mental health ,Cognitive Sciences - Abstract
Bilinguals' ability to control which language they speak and to switch between languages may rely on neurocognitive mechanisms shared with non-linguistic task switching. However, recent studies also reveal some limitations on the extent control mechanisms are shared across domains, introducing the possibility that some control mechanisms are unique to language. We investigated this hypothesis by directly comparing the neural correlates of task switching and language switching. Nineteen Spanish-English bilingual university students underwent a functional magnetic resonance imaging (fMRI) study employing a hybrid (event-related and blocked) design involving both color-shape switching and language switching paradigms. We compared the two switching tasks using within-subject voxel-wise t-tests for each of three trial types (single trials in single blocks, and stay and switch trials in mixed blocks). Comparing trial types to baseline in each task revealed widespread activation for single, stay, and switch trials in both color-shape and language switching. Direct comparisons of each task for each trial type revealed few differences between tasks on single and switch trials, but large task differences during stay trials, with more widespread activation for the non-linguistic than for the language task. Our results confirm previous suggestions of shared mechanisms of switching across domains, but also reveal bilinguals have greater efficiency for sustaining the inhibition of the non-target language than the non-target task when two responses are available. This efficiency of language control might arise from bilinguals' need to control interference from the non-target language specifically when not switching languages, when speaking in single- or mixed-language contexts.
- Published
- 2015
37. Which Neuropsychological Tests Predict Progression to Alzheimer’s Disease in Hispanics?
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Gali H. Weissberger, Tamar H. Gollan, David P. Salmon, and Mark W. Bondi
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Male ,Psychometrics ,Neuropsychological Tests ,Article ,Developmental psychology ,Executive Function ,Cognition ,Alzheimer Disease ,Predictive Value of Tests ,medicine ,Verbal fluency test ,Humans ,Cognitive Dysfunction ,Neuropsychological assessment ,Cognitive decline ,Aged ,Language ,Aged, 80 and over ,medicine.diagnostic_test ,Neuropsychology ,Neuropsychological test ,Hispanic or Latino ,Middle Aged ,Neuropsychology and Physiological Psychology ,Boston Naming Test ,Disease Progression ,Female ,Psychology ,Cognition Disorders ,Clinical psychology - Abstract
Objective: To investigate which neuropsychological tests predict eventual progression to Alzheimer's disease (AD) in both Hispanic and non-Hispanic individuals. Although our approach was exploratory, we predicted that tests that underestimate cognitive ability in healthy aging Hispanics might not be sensitive to future cognitive decline in this cultural group. Method: We compared first-year data of 22 older adults (11 Hispanic) who were diagnosed as cognitively normal but eventually developed AD (decliners), to 60 age- and education-matched controls (27 Hispanic) who remained cognitively normal. To identify tests that may be culturally biased in our sample, we compared Hispanic with non-Hispanic controls on all tests and asked which tests were sensitive to future decline in each cultural group. Results: Compared to age-, education-, and gender-matched non-Hispanic controls, Hispanic controls obtained lower scores on tests of language, executive function, and some measures of global cognition. Consistent with our predictions, some tests identified non-Hispanic, but not Hispanic, decliners (vocabulary, semantic fluency). Contrary to our predictions, a number of tests on which Hispanics obtained lower scores than non-Hispanics nevertheless predicted eventual progression to AD in both cultural groups (e.g., Boston Naming Test [BNT], Trails A and B). Conclusions: Cross-cultural variation in test sensitivity to decline may reflect greater resistance of medium difficulty items to decline and bilingual advantages that initially protect Hispanics against some aspects of cognitive decline commonly observed in non-Hispanics with preclinical AD. These findings highlight a need for further consideration of cross-cultural differences in neuropsychological test performance and development of culturally unbiased measures.
- Published
- 2013
38. Partially Overlapping Mechanisms of Language and Task Control in Young and Older Bilinguals
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Gali H. Weissberger, Mark W. Bondi, Christina E. Wierenga, and Tamar H. Gollan
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Male ,Task switching ,Aging ,Social Psychology ,Multilingualism ,behavioral disciplines and activities ,Article ,Task (project management) ,Developmental psychology ,Executive Function ,Young Adult ,Form perception ,Reaction Time ,Humans ,Control (linguistics) ,Neuroscience of multilingualism ,Aged ,Language ,Cued speech ,Contrast (statistics) ,Form Perception ,Female ,Geriatrics and Gerontology ,Psychology ,psychological phenomena and processes ,Color Perception ,Cognitive psychology - Abstract
The current study tested the hypothesis that bilinguals rely on domain-general mechanisms of executive control to achieve language control by asking if linguistic and nonlinguistic switching tasks exhibit similar patterns of aging-related decline. Thirty young and 30 aging bilinguals completed a cued language-switching task and a cued color-shape switching task. Both tasks demonstrated significant aging effects, but aging-related slowing and the aging-related increase in errors were significantly larger on the color-shape than on the language task. In the language task, aging increased language-switching costs in both response times and errors, and language-mixing costs only in response times. In contrast, the color-shape task exhibited an aging-related increase in costs only in mixing errors. Additionally, a subset of the older bilinguals could not do the color-shape task, but were able to do the language task, and exhibited significantly larger language-switching costs than matched controls. These differences, and some subtle similarities, in aging effects observed across tasks imply that mechanisms of nonlinguistic task and language control are only partly shared and demonstrate relatively preserved language control in aging. More broadly, these data suggest that age deficits in switching and mixing costs may depend on task expertise, with mixing deficits emerging for less-practiced tasks and switching deficits for highly practiced, possibly "expert" tasks (i.e., language).
- Published
- 2012
39. Stability in geomechanics, experimental and numerical analyses
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Laouafa, F., Prunier, F., Daouadji, A., Gali, H. Al, Darve, F., Laboratoire Environnement Géomécanique et Ouvrages (LAEGO), Institut National Polytechnique de Lorraine (INPL), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Institut National de l'Environnement Industriel et des Risques (INERIS), Laboratoire de physique et mécanique des matériaux (LPMM), and Université Paul Verlaine - Metz (UPVM)-Institut National Polytechnique de Lorraine (INPL)-Ecole Nationale d'Ingénieurs de Metz (ENIM)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SPI]Engineering Sciences [physics] ,STABILITY ,EIGENVALUES ,SAND ,EXPERIMENTAL ,GEOMECHANICS ,[SDE]Environmental Sciences ,[SDU.STU]Sciences of the Universe [physics]/Earth Sciences ,SLOPE STABILITY ,ComputingMilieux_MISCELLANEOUS ,SECOND-ORDER WORK - Abstract
International audience; One of the main consequences of the nonassociative character of plastic strains in geomaterials is the existence of failure states strictly inside the Mohr-Coulomb plastic limit surface. This point is first emphasized by considering proportional strain loading paths as generalizations of the classical undrained triaxial path. It is shown that the sign of the second-order work is a proper criterion for analyzing these particular failure states. Then, experimental results and theoretical curves (obtained from an incrementally nonlinear constitutive relation) are compared for the case of proportional stress paths in axisymmetric conditions. Main features of the second-order work criterion are identified, such as the existence of a bifurcation domain together with a number of instability cones inside the Mohr-Coulomb surface. Furthermore, decomposing the second-order work into its isotropic and deviatoric parts makes it possible to compare each of the respective contributions to material instability. Finally, a heuristic boundary value problem is simulated via finite element modelling. A spectral analysis of the symmetric part of the stiffness matrix is conducted to extract the first vanishing eigenvalue and its associated eigenvector. It is found that the displacement field related to this eigenvector appears to be very close to the displacement computed just before global numerical breakdown signalling an effective failure. A plausible explanation is that, considering a material point, the flow rule at the boundary of the bifurcation domain almost coincides with the one describing the failure mechanism on the Mohr-Coulomb plastic limit surface.
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- 2011
- Full Text
- View/download PDF
40. Diffuse failure in geomaterials: Experiments, theory and modelling
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Daouadji, A., Darve, F., Al Gali, H., Hicher, Pierre-Yves, Laouafa, F., Lignon, S., Nicot, François, Nova, R., Pinheiro, M., Prunier, Florent, Sibille, L., Wan, R., Laboratoire de physique et mécanique des matériaux (LPMM), Université Paul Verlaine - Metz (UPVM)-Institut National Polytechnique de Lorraine (INPL)-Ecole Nationale d'Ingénieurs de Metz (ENIM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Institut National de l'Environnement Industriel et des Risques (INERIS), Groupe de Recherche en Sciences Pour l'Ingénieur - EA 4694 (GRESPI), SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA), Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Department of Structural Engineering, Politecnico di Milano [Milan] (POLIMI), Department of Civil Engineering, University of Calgary, Géomécanique, Matériaux et Structures (GEOMAS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Reims Champagne-Ardenne (URCA)-SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)), and Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)
- Subjects
second-order work ,instability ,loss of uniqueness ,bifurcation ,kinetic energy ,[SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique ,[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] ,nonassociative elastoplasticity ,diffuse failure ,failure - Abstract
International audience; This paper presents a synthesis of the works performed by various teams from France, Italy and Canada around the question of second‐order work criterion. Because of the non‐associative character of geomaterials plastic strains, it is now recognized that a whole bifurcation domain exists in the stress space with various possible modes of failure. In a first part these failure modes are observed in lab experimental tests and in discrete element modelling. Then a theoretical study of second‐order work allows to establish a link with the kinetic energy, giving a basis to explain the transition from a prefailure (quasi)static regime to a postfailure dynamic regime. Eventually the main features of geomaterials failure are obtained by applying second‐order work criterion to five different constitutive rate‐independent models—three being phenomenological and two micromechanical. As a whole this paper tries to gather together all the elements for a proper understanding and use of second‐order work criterion in geomechanics.
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- 2011
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- View/download PDF
41. P2‐162: Quantitative and qualitative features of animal fluency as predictors of global cognitive decline
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Gali H. Weissberger, Sarah M. Jurick, Dean C. Delis, Jason T. Gravano, Lindsay R. Clark, Mark W. Bondi, David P. Salmon, and Yu-Ling Chang
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Psychiatry and Mental health ,Cellular and Molecular Neuroscience ,Fluency ,Developmental Neuroscience ,Epidemiology ,Health Policy ,Neurology (clinical) ,Geriatrics and Gerontology ,Cognitive decline ,Psychology ,Developmental psychology - Published
- 2010
- Full Text
- View/download PDF
42. Aggregate effects of vascular risk factors on cerebrovascular changes in autopsy‐confirmed Alzheimer's disease
- Author
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Daniel A. Nation, Katherine J. Bangen, Lawrence A. Hansen, Douglas Galasko, Gali H. Weissberger, Mark W. Bondi, David P. Salmon, and Lisa Delano-Wood
- Subjects
Adult ,Male ,medicine.medical_specialty ,Pathology ,Epidemiology ,Blood Pressure ,Disease ,Neuropathology ,Article ,Cellular and Molecular Neuroscience ,Developmental Neuroscience ,Alzheimer Disease ,Risk Factors ,Diabetes mellitus ,Internal medicine ,medicine ,Humans ,Dementia ,cardiovascular diseases ,Stroke ,Aged ,Aged, 80 and over ,Neurologic Examination ,Psychiatric Status Rating Scales ,business.industry ,Health Policy ,Smoking ,Brain ,Atrial fibrillation ,Arteriosclerosis ,Middle Aged ,equipment and supplies ,medicine.disease ,Psychiatry and Mental health ,Cardiovascular Diseases ,Cardiology ,Female ,Autopsy ,Neurology (clinical) ,Geriatrics and Gerontology ,Alzheimer's disease ,business - Abstract
We examined the relationships of antemortem vascular risk factors to postmortem cerebrovascular and Alzheimer's disease (AD) pathologies. Eighty-four AD patients underwent an assessment of vascular risk (blood pressure, cholesterol, smoking, cardiovascular disease, diabetes, atrial fibrillation, transient ischemic attack [TIA], or stroke) and later underwent brain autopsy. Given our aim to examine mild cerebrovascular changes (CVCs), individuals were excluded if autopsy revealed large stroke. The most common forms of CVC were circle of Willis atherosclerosis followed by arteriosclerosis, lacunes, and microinfarcts. Excluding the history of TIA/clinical stroke, individual vascular risk factors were not associated with CVC. However, the presence of multiple vascular risk factors was associated with CVC. Furthermore, the presence of CVC was associated with lower Braak and Braak stage. These findings highlight the importance of aggregate risk in the vascular contribution to dementia. Interventions designed to maintain cerebrovascular health may represent important opportunities for preventing or delaying dementia, even when AD is the dominant pathology.
- Published
- 2014
- Full Text
- View/download PDF
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