10 results on '"Dykstra AD"'
Search Results
2. Epidemiology of Existing Extensor Mechanism Pathology in Primary Anterior Cruciate Ligament Ruptures in an Active-Duty Population.
- Author
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Balog TP, Blanks BP, Dykstra AD, Parada SA, and Arrington ED
- Subjects
- Adult, Anterior Cruciate Ligament Injuries diagnostic imaging, Anterior Cruciate Ligament Injuries surgery, Comorbidity, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Prevalence, Tendinopathy diagnostic imaging, Young Adult, Anterior Cruciate Ligament Injuries epidemiology, Anterior Cruciate Ligament Reconstruction, Military Personnel, Tendinopathy epidemiology
- Abstract
The purpose of this study is to determine the prevalence of potential graft-influencing pathologies of the extensor mechanism of the knee in patients presenting with a primary anterior cruciate ligament (ACL) rupture. We performed a retrospective review of the plain radiographs and magnetic resonance imaging (MRI) of all active-duty patients presenting with a primary ACL rupture at our institution between July 2006 and February 2009. Imaging was reviewed to determine the presence of a multipartite patella, unresolved Osgood-Schlatter's disease, and/or radiographic evidence suggestive of patella tendinopathy. A total of 197 patients were reviewed, including 27 females and 170 males. One patient (0.5%) had a bipartite patella and 4 patients (2%) had free-floating ossicles about the tibial tuberosity consistent with unresolved Osgood-Schlatter's disease. A total of 15 patients (7.6%) showed MRI evidence suggestive of patella tendinopathy. This study revealed 20 patients out of 197 (10.1%) who presented with existing extensor mechanism pathologies in radiologic studies. While preoperative imaging is routinely used to confirm clinical suspicion of ACL rupture or identify associated injuries, this study shows that it can also identify existing extensor mechanism pathologies that could ultimately influence the use of an extensor mechanism graft., Competing Interests: Authors’ Disclosure Statement: The authors report no actual or potential conflict of interest in relation to this article.
- Published
- 2018
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3. Digital Tomography for Detection of Acute Occult Scaphoid Fractures.
- Author
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Barcia AM, Zhou L, Cook JB, Lindell KK, Gumboc RD, Dykstra AD, Lachky RJ, Shaha SH, and Taylor KF
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- Adult, Female, Humans, Magnetic Resonance Imaging, Male, Prospective Studies, Radiation Exposure, Fractures, Closed diagnostic imaging, Radiographic Image Enhancement, Scaphoid Bone diagnostic imaging, Scaphoid Bone injuries, Tomography, X-Ray methods
- Abstract
Diagnosis of occult scaphoid fractures remains a challenge. Traditional management consisting of 2 weeks of immobilization and repeat radiographs results in unnecessary immobilization of many patients without fracture. Magnetic resonance imaging (MRI) is sensitive but expensive. Digital tomography (DT) is an imaging technique that provides fine-cut visualization with minimal radiation exposure and may be used when there is high clinical suspicion despite negative findings on initial radiographs. The authors compared the ability of DT vs MRI to detect acute occult scaphoid fractures. This was an institutional review board-approved, prospective series. Adults for which clinical suspicion for acute scaphoid fracture (presenting within 96 hours of trauma) and negative findings on initial radiographs existed were included. Both a wrist tomogram and MRI were obtained. Wrists were immobilized and reevaluated at 10 to 14 days with repeat radiographs as a control. Studies were interpreted by a radiologist in a blinded fashion. Forty consecutive extremities in 39 patients met the inclusion criteria. Six (15%) of the 40 scaphoids were determined to be fractured on repeat radiographs. Digital tomogram yielded positive findings in 4 of these. Magnetic resonance imaging yielded positive findings in 8 (20%) of the 40 extremities. Sensitivities were 67% and 100% for digital tomogram and MRI, respectively (P=.0001). The positive predictive value was 100% for DT and MRI. The authors found that DT detects more occult scaphoid fractures than initial standard radiographs but is less sensitive than MRI. This is the first study to compare DT with MRI. Digital tomography can be used to augment radiographs and may increase diagnostic efficiency, minimize unnecessary immobilization, and reduce health care costs. [Orthopedics. 2017; 40(6):e1092-e1095.]., (Copyright 2017, SLACK Incorporated.)
- Published
- 2017
- Full Text
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4. Evaluation of Speech Amplification Devices in Parkinson's Disease.
- Author
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Andreetta MD, Adams SG, Dykstra AD, and Jog M
- Subjects
- Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Perceptual Masking, Speech Intelligibility, Communication Devices for People with Disabilities, Parkinson Disease therapy, Speech Acoustics, Speech Disorders therapy, Voice Disorders therapy
- Abstract
Purpose: The purpose of this study was to evaluate the efficacy of selected speech amplification devices in individuals with hypophonia and idiopathic Parkinson's disease (PD)., Method: This study compared the effectiveness of seven devices (ADDvox, BoomVox, ChatterVox, Oticon Amigo, SoniVox, Spokeman, and Voicette) to unamplified speech for 11 participants with PD during conversation in 65-dB SPL multitalker noise, using experience ratings collected from participant questionnaires and speech performance measures (i.e., speech-to-noise ratio [SNR], speech intensity, and intelligibility) obtained from audio recordings., Results: Compared with unamplified speech, device use increased SNR by 1.07-4.73 dB SPL and speech intensity by 1.1-5.1 dB SPL, and it significantly increased transcribed intelligibility from 13.8% to 58.9%. In addition, the type of device used significantly affected speech performance measures (e.g., BoomVox was significantly higher than most of the other devices for SNR, speech intensity, and intelligibility). However, experience ratings did not always correspond to performance measures., Conclusions: This study found preliminary evidence of improved speech performance with device use for individuals with PD. A tentative hierarchy is suggested for device recommendations. Future research is needed to determine which measures will predict long-term device acceptance in PD.
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- 2016
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5. Effect of concurrent walking and interlocutor distance on conversational speech intensity and rate in Parkinson's disease.
- Author
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McCaig CM, Adams SG, Dykstra AD, and Jog M
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- Aged, Aged, 80 and over, Case-Control Studies, Humans, Male, Middle Aged, Parkinson Disease physiopathology, Speech physiology, Speech Production Measurement, Walking physiology
- Abstract
Previous studies have demonstrated a negative effect of concurrent walking and talking on gait in Parkinson's disease (PD) but there is limited information about the effect of concurrent walking on speech production. The present study examined the effect of sitting, standing, and three concurrent walking tasks (slow, normal, fast) on conversational speech intensity and speech rate in fifteen individuals with hypophonia related to idiopathic Parkinson's disease (PD) and fourteen age-equivalent controls. Interlocuter (talker-to-talker) distance effects and walking speed were also examined. Concurrent walking was found to produce a significant increase in speech intensity, relative to standing and sitting, in both the control and PD groups. Faster walking produced significantly greater speech intensity than slower walking. Concurrent walking had no effect on speech rate. Concurrent walking and talking produced significant reductions in walking speed in both the control and PD groups. In general, the results of the present study indicate that concurrent walking tasks and the speed of concurrent walking can have a significant positive effect on conversational speech intensity. These positive, "energizing" effects need to be given consideration in future attempts to develop a comprehensive model of speech intensity regulation and they may have important implications for the development of new evaluation and treatment procedures for individuals with hypophonia related to PD., (Crown Copyright © 2015. Published by Elsevier B.V. All rights reserved.)
- Published
- 2016
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6. Examining the relationship between speech intensity and self-rated communicative effectiveness in individuals with Parkinson's disease and hypophonia.
- Author
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Dykstra AD, Adams SG, and Jog M
- Subjects
- Adult, Aged, Case-Control Studies, Dysarthria etiology, Female, Humans, Male, Middle Aged, Parkinson Disease complications, Self-Assessment, Speech Intelligibility, Speech Perception, Dysarthria psychology, Parkinson Disease psychology
- Abstract
Purpose: To examine the relationship between speech intensity and self-ratings of communicative effectiveness in speakers with Parkinson's disease (PD) and hypophonia. An additional purpose was to evaluate if self-ratings of communicative effectiveness made by participants with PD differed from ratings made by primary communication partners., Methods: Thirty participants with PD and 15 healthy older adults completed the Communication Effectiveness Survey. Thirty primary communication partners rated the communicative effectiveness of his/her partner with PD. Speech intensity was calculated for participants with PD and control participants based on conversational utterances., Results: Results revealed significant differences between groups in conversational speech intensity (p=.001). Participants with PD self-rated communicative effectiveness significantly lower than control participants (p=.000). Correlational analyses revealed a small but non-significant relationship between speech intensity and communicative effectiveness for participants with PD (r=0.298, p=.110) and control participants (r=0.327, p=.234). Self-ratings of communicative effectiveness made participants with PD was not significantly different than ratings made by primary communication partners (p=.20)., Conclusions: Obtaining information on communicative effectiveness may help to broaden outcome measurement and may aid in the provision of educational strategies. Findings also suggest that communicative effectiveness may be a separate and a distinct construct that cannot necessarily be predicted from the severity of hypophonia., (Copyright © 2015 Elsevier Inc. All rights reserved.)
- Published
- 2015
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7. Loudness perception and speech intensity control in Parkinson's disease.
- Author
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Clark JP, Adams SG, Dykstra AD, Moodie S, and Jog M
- Subjects
- Aged, Aged, 80 and over, Case-Control Studies, Female, Humans, Male, Middle Aged, Parkinson Disease physiopathology, Speech Perception, Loudness Perception, Parkinson Disease complications, Speech physiology
- Abstract
Unlabelled: The aim of this study was to examine loudness perception in individuals with hypophonia and Parkinson's disease. The participants included 17 individuals with hypophonia related to Parkinson's disease (PD) and 25 age-equivalent controls. The three loudness perception tasks included a magnitude estimation procedure involving a sentence spoken at 60, 65, 70, 75 and 80 dB SPL, an imitation task involving a sentence spoken at 60, 65, 70, 75 and 80 dB SPL, and a magnitude production procedure involving the production of a sentence at five different loudness levels (habitual, two and four times louder and two and four times quieter). The participants with PD produced a significantly different pattern and used a more restricted range than the controls in their perception of speech loudness, imitation of speech intensity, and self-generated estimates of speech loudness. The results support a speech loudness perception deficit in PD involving an abnormal perception of externally generated and self-generated speech intensity., Learning Outcomes: Readers will recognize that individuals with hypophonia related to Parkinson's disease may demonstrate a speech loudness perception deficit involving the abnormal perception of externally generated and self-generated speech intensity., (Copyright © 2014 Elsevier Inc. All rights reserved.)
- Published
- 2014
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8. A comprehensive description of functioning and disability in children with velopharyngeal insufficiency.
- Author
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Dzioba A, Skarakis-Doyle E, Doyle PC, Campbell W, and Dykstra AD
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- Child, Disability Evaluation, Children with Disabilities psychology, Humans, Psychology, Speech Disorders etiology, Speech Intelligibility, Velopharyngeal Insufficiency classification, Velopharyngeal Insufficiency complications, Velopharyngeal Insufficiency psychology, Velopharyngeal Insufficiency diagnosis
- Abstract
Unlabelled: Children with velopharyngeal insufficiency (VPI) experience functional impairments in a variety of areas that extend beyond the primary physical impairment associated with this disorder. At present, the physical deficits associated with VPI have been studied extensively; however, a comprehensive description of social and communicative participation in this population is needed. Therefore, a biopsychosocial framework such as the International Classification of Functioning, Disability and Health for Children and Youth (ICF-CY), may offer an enhanced understanding of the daily experiences of children with VPI. Specifically, the ICF-CY framework is intended to model complex nonlinear systems, and as such, to describe functioning as the interaction of multiple components from which a limitation in communicative participation may emerge. This paper describes how the ICF-CY framework can be utilized to comprehensively describe functioning and disability in children with VPI by describing the interaction of components of this framework., Learning Outcomes: As a result of this activity, the reader will be able to: (1) discuss the utility of the ICF-CY in describing the multi-dimensional nature of velopharyngeal insufficiency (VPI); (2) describe interrelationships between functioning and disability in children with VPI; and (3) identify how limitations in communicative participation may emerge from the interaction of components of the ICF-CY in children with VPI., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
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9. Nature and the natural environment as health facilitators: the need to reconceptualize the ICF environmental factors.
- Author
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Day AM, Theurer JA, Dykstra AD, and Doyle PC
- Subjects
- Activities of Daily Living, Disability Evaluation, Environment Design, Humans, Persons with Disabilities classification, Persons with Disabilities rehabilitation, Environment, International Classification of Diseases, Nature, Social Environment
- Abstract
Purpose: This work examines the environmental factors component of the International Classification of Functioning, Disability, and Health (ICF) relative to current health-facilitating evidence about natural environmental factors. We argue that the environmental factors component warrants reconceptualization in order to offer an extended and more systematic framework for identifying and measuring health-facilitating natural environmental factors., Method: Current evidence highlighting the potential health-facilitating benefits of natural environmental factors is synthesized and considered in the context of the ICF framework and its coding system., Results: In its current form, the ICF's conceptual framework and coding system are inadequate for identifying and measuring natural environmental factors in individuals and groups with and/or without health conditions., Conclusion: The ICF provides an advanced framework for health and disability that reflects contemporary conceptualizations about health. However, given the scope of emerging evidence highlighting positive health and well-being outcomes associated with natural environmental factors, we believe the environmental factors component requires further advancement to reflect this current knowledge. Reconceptualizing the environmental factors component supports a more holistic interpretation of the continuum of environmental factors as both facilitators and barriers. In doing so, it strengthens the ICF's utility in identifying and measuring health-facilitating natural environmental factors.
- Published
- 2012
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10. Application of the ICF in reduced speech intelligibility in dysarthria.
- Author
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Dykstra AD, Hakel ME, and Adams SG
- Subjects
- Aged, Communication Devices for People with Disabilities, Dysarthria diagnosis, Dysarthria rehabilitation, Humans, Male, Parkinson Disease classification, Parkinson Disease diagnosis, Parkinson Disease rehabilitation, Quality of Life, Social Adjustment, Social Environment, World Health Organization, Activities of Daily Living classification, Disability Evaluation, Dysarthria classification, Speech Intelligibility
- Abstract
Regardless of the underlying neuromotor impairment, an almost universal consequence of dysarthria is a reduction in speech intelligibility. The purpose of this article is to examine critically and to discuss issues related directly to speech intelligibility in speakers with dysarthria. Reduced speech intelligibility resulting from dysarthria is examined using the World Health Organization's International Classification of Functioning, Disability and Health (ICF) conceptual framework. We propose that the ICF conceptual framework facilitates an awareness of the multidimensional nature of disablement. Furthermore, the ICF facilitates a broad understanding of the complex nature of dysarthria, ranging from the neuroanatomical and physiological substrates contributing to reduced speech intelligibility, to the effects of this type of communication disorder on an individual's functioning in society and beyond. Finally, a case example is presented that describes how the ICF can be applied to an individual with dysarthria and reduced speech intelligibility.
- Published
- 2007
- Full Text
- View/download PDF
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