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Aim: This pilot study explored whether childhood stroke impairs performance on theory of mind (ToM) tasks and whether ToM task performance correlates with resting state connectivity in brain regions linked with social cognition. Method: We performed a case-control study of 10 children with stroke and 10 age- and gender-matched controls. They completed 2 ToM tasks, and resting state connectivity was measured with functional magnetic resonance imaging (MRI). Results: Children with stroke performed worse than controls on conative ToM tasks. Resting state connectivity in the central executive network was significantly higher and connectivity between right and left inferior parietal lobules was significantly decreased in children with stroke. Resting state activity and ToM performance were not significantly correlated. Interpretation: Childhood stroke results in poorer performance on specific ToM tasks. Stroke is associated with changes in resting state connectivity in networks linked with social cognition including ToM. Although the basis for these changes in connectivity is not well understood, these results may provide preliminary insights into potential mechanisms affecting social cognition after stroke. The findings suggest that further study of the effect of childhood stroke on network connectivity may yield insights as to how stroke affects cognitive functions in children.

Objective To examine changes in depression and distress in parents of adolescents receiving family-problem-solving therapy (F-PST) following traumatic brain injury. Method Families of adolescents hospitalized for moderate to severe traumatic brain injury were randomized to face-to-face F-PST (34), therapist-guided online F-PST (56), or self-guided online F-PST (60). Outcomes were assessed pretreatment and 6 and 9 months later. Parents rated depression and distress on the Center for Epidemiological Studies Depression Scale and the Brief Symptom Inventory, respectively. Mixed modeling was used to examine changes over time and treatment moderators. Results The therapist-guided online group had significant reductions in parental depression over time. Analyses of slopes of recovery revealed differential improvement on the Center for Epidemiological Studies Depression Scale between the 2 online groups, with no significant change in depressive symptoms following self-guided F-PST. On the Brief Symptom Inventory Global Severity Index, the therapist-guided online group reported significant improvement from baseline to 6 months that was maintained at 9 months. The face-to-face and self-guided online groups reported significant reductions in distress between 6 and 9 months with corresponding large effect sizes. Differences on the Center for Epidemiological Studies Depression Scale between therapist-guided and self-guided online groups at the 9-month follow-up were more pronounced in families of lower socioeconomic status, t103 = -2.87; P = .005. Conclusions Findings provide further support for the utility of therapist-guided online F-PST in reducing parental depression and distress following pediatric traumatic brain injury and offer limited evidence of the efficacy of self-guided online treatment for these outcomes. Families of lower socioeconomic status may benefit more from therapist involvement.

Objective To quantify changes in segmented brain volumes over 12 months in children with mucopolysaccharidosis types IIIA and IIIB (MPS IIIA and IIIB). Methods In order to establish suitable outcome measures for clinical trials, twenty-five children greater than 2 years of age were enrolled in a prospective natural history study of MPS IIIA and IIIB at Nationwide Children's Hospital. Data from sedated non-contrast brain 3 T MRIs and neuropsychological measures were reviewed from the baseline visit and at 12-month follow-up. No intervention beyond standard clinical care was provided. Age- and sex-matched controls were gathered from the National Institute of Mental Health Data Archive. Automated brain volume segmentation with longitudinal processing was performed using FreeSurfer. Results Of the 25 subjects enrolled with MPS III, 17 children (4 females, 13 males) completed at least one MRI with interpretable volumetric data. The ages ranged from 2.8 to 13.7 years old (average 7.2 years old) at enrollment, including 8 with MPS IIIA and 9 with MPS IIIB. At baseline, individuals with MPS III demonstrated reduced cerebral white matter and corpus callosum volumes, but greater volumes of the lateral ventricles, cerebellar cortex, and cerebellar white matter compared to controls. Among the 13 individuals with MPS III with two interpretable MRIs, there were annualized losses or plateaus in supratentorial brain tissue volumes (cerebral cortex −42.10 ± 18.52 cm3/year [mean ± SD], cerebral white matter −4.37 ± 11.82 cm3/year, subcortical gray matter −6.54 ± 3.63 cm3/year, corpus callosum −0.18 ± 0.62 cm3/yr) and in cerebellar cortex (−0.49 ± 12.57 cm3/year), with a compensatory increase in lateral ventricular volume (7.17 ± 6.79 cm3/year). Reductions in the cerebral cortex and subcortical gray matter were more striking in individuals younger than 8 years of age. Greater cerebral cortex volume was associated with higher fine and gross motor functioning on the Mullen Scales of Early Learning, while greater subcortical gray matter volume was associated with higher nonverbal functioning on the Leiter International Performance Scale. Larger cerebellar cortex was associated with higher receptive language performance on the Mullen, but greater cerebellar white matter correlated with worse adaptive functioning on the Vineland Adaptive Behavioral Scales and visual problem-solving on the Mullen. Conclusions Loss or plateauing of supratentorial brain tissue volumes may serve as longitudinal biomarkers of MPS III age-related disease progression compared to age-related growth in typically developing controls. Abnormally increased cerebellar white matter in MPS III, and its association with worse performance on neuropsychological measures, suggest the possibility of pathophysiological mechanisms distinct from neurodegeneration-associated atrophy that warrant further investigation.

OBJECTIVE: To examine the comparative effectiveness of three modes of family problem-solving therapy (F-PST): therapist-guided online, self-guided online, and face-to-face. SETTING: Four children’s hospitals and a general hospital with pediatric commitment. PARTICIPANTS: 150 adolescents aged 14 to 18 years, previously hospitalized with traumatic brain injury (TBI), and evidence of behavior problems at enrollment. DESIGN: Multicenter, randomized clinical trial (RCT). MAIN MEASURES: Behavior Rating Inventory of Executive Function (BRIEF) Global Executive Composite (GEC), Behavior Regulation Index (BRI), and Metacognitive Index (MI) and Strengths and Difficulties Questionnaire total (SDQ) at baseline and 6 and 9 months later. RESULTS: Mixed model intention-to-treat analyses of comparative effectiveness failed to reveal statistically significant differences among treatment groups. At six months, parent BRIEF-GEC improved for the therapist-guided and self-guided, online groups. Effects remained significant and increased in magnitude at 9 months for the self-guided online group. Scores for the Self-guided online group significantly improved from baseline to 9 months on the SDQ Total. CONCLUSIONS: This comparative effectiveness study supports the utility of both self- and therapist-guided online F-PST in improving executive function behaviors in adolescents following TBI. Further work regarding clinical implementation and how best to integrate telehealth with ongoing rehabilitation care is warranted.

Objective Adolescent traumatic brain injury (TBI) contributes to deficits in executive functioning and behavior, but few evidence-based treatments exist. We conducted a randomized clinical trial comparing Teen Online Problem Solving with Family (TOPS-Family) with Teen Online Problem Solving with Teen Only (TOPS-TO) or the access to Internet Resources Comparison (IRC) group. Methods Children, aged 11 to 18 years, who sustained a complicated mild-to-severe TBI in the previous 18 months were randomly assigned to the TOPS-Family (49), TOPS-TO (51), or IRC group (52). Parent and self-report measures of externalizing behaviors and executive functioning were completed before treatment and 6 months later. Treatment effects were examined using linear regression models, adjusting for baseline symptom levels. Age, maternal education, and family stresses were examined as moderators. Results The TOPS-Family group had lower levels of parent-reported executive dysfunction at follow-up than the TOPS-TO group, and differences between the TOPS-Family and IRC groups approached significance. Maternal education moderated improvements in parent-reported externalizing behaviors, with less educated parents in the TOPS-Family group reporting fewer symptoms. On the self-report Behavior Rating Inventory of Executive Functions, treatment efficacy varied with the level of parental stresses. The TOPS-Family group reported greater improvements at low stress levels, whereas the TOPS-TO group reported greater improvement at high-stress levels. The TOPS-TO group did not have significantly lower symptoms than the IRC group on any comparison. Conclusion Findings support the efficacy of online family problem solving to address executive dysfunction and improve externalizing behaviors among youth with TBI from less advantaged households. Treatment with the teen alone may be indicated in high-stress families.

Conventional neuroimaging is not recommended for the routine diagnosis of concussion, but some patients with concussion undergo computed tomography (CT) or magnetic resonance imaging (MRI). The objective of this study was to explore the clinical factors that predict neuroimaging utilization in concussion.Concussion-related CT and MRI data were analysed from 1953 patients, aged 10-19 years, who presented to a sports concussion clinic within 30 days of injury.The majority of CT scans (n = 193) were obtained during the acute concussion period (mean = 2.7 days post-concussion), whereas MRI scans (n = 134) were ordered later during recovery (mean = 39.4 days post-concussion). Predictors of CT utilization included loss of consciousness, amnesia and vomiting (all p0.001). Prior concussion (p = 0.002) and continued participation in activity after injury (p = 0.03) predicted greater MRI utilization. Neuroimaging with either CT (p = 0.024, hazard ratio = 1.2) or MRI (p0.001, hazard ratio = 2.75) was associated with prolonged symptoms. Only 3.1% of CTs and 1.5% of MRIs demonstrated signs of traumatic brain injury.Several clinical factors predict neuroimaging utilization in patients with concussion. CT is generally used acutely, while MRI is used in the sub-acute and chronic post-concussion periods. In a sports concussion clinic, delayed neuroimaging has limited clinical yield.

OBJECTIVE To examine changes in quality of life (QoL) in adolescents receiving family problem-solving therapy (F-PST) following traumatic brain injury (TBI). METHOD Adolescents hospitalized for moderate-to-severe TBI were randomized to 1 of 3 ten-session, 6-month long treatments: face-to-face F-PST (n = 34), therapist-guided online F-PST (n = 56), and self-guided online F-PST (n = 60). Participants included 96 boys and 54 girls, of whom 124 were White and 6 were Hispanic. Outcomes were assessed pretreatment and 6 and 9 months later. Adolescents and parents rated adolescent QoL and TBI-related symptoms on the PedsQL and Health and Behavior Inventory (HBI), respectively. We used mixed modeling to examine changes over time and moderators of treatment efficacy. RESULTS Therapist- and self-guided online groups demonstrated improvements in parent-proxy QoL from baseline to 9 months, Cohen's d = 0.75; p = .004 and Cohen's d = 1.30; p < .001, respectively. The face-to-face group had poorer parent-proxy QoL at 6 months (M = 62, SE = 3.4) than either the therapist- (M = 70.9, SE = 2.8) or self-guided online group (M = 71.1, SE = 2.6). There were no changes or group differences in self-reported QoL over time. Similar findings were observed on the HBI. Differential treatment effects on parent-proxy outcomes were found in boys versus girls and in those from single versus 2-parent households. Improvements in parent-proxy HBI ratings mediated QoL improvements. CONCLUSIONS Both online treatments, but not face-to-face F-PST, were associated with clinical improvements, raising questions about our current delivery paradigm. Individual and family moderators of treatment efficacy underscore the potential of personalized treatment. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Objective To characterize treatment preferences for delivery of family problem-solving treatment (F-PST) to adolescents with behavioral challenges following traumatic brain injury (TBI) and to examine associations with attrition, adherence, satisfaction, and efficacy. Method Adolescents who had been hospitalized for moderate to severe TBI were randomized to face-to-face F-PST (n = 34), therapist-guided online F-PST (n = 56), and self-guided online F-PST (n = 60). Adolescents and parents rated treatment convenience and anticipated benefit before group assignment. Sessions completed served as an index of adherence. Satisfaction was rated posttreatment. The Behavior Rating Inventory of Executive Function and Strengths and Difficulties Questionnaire were used to assess parent-reported behavioral concerns. Results Both parents and adolescents were more likely to agree or strongly agree that they anticipated self-guided online F-PST to be the most convenient relative to either of the therapist-involved approaches. Parents were also less likely to anticipate face-to-face treatment as most beneficial, relative to the two online treatments. Adolescent preferences were significantly related to attrition with 27% versus 13% dropout rates for those assigned to nonpreferred and preferred treatments, respectively. Parent and adolescent preferences before treatment were unrelated to post-intervention satisfaction, adherence, or improvements in parent-reported child behavior problems. Conclusions Online treatments are perceived favorably among adolescents with TBI and their parents. For adolescents, these pretreatment preferences influenced treatment completion. Poor correspondence between initial preferences and posttreatment satisfaction and benefit suggests that therapeutic experience more strongly influences ultimate satisfaction.

This study aims to evaluate the efficacy of a brief cognitive behavioral intervention program for children and adolescents experiencing persistent post-concussion symptoms. A total of 31 patients aged 10 to 18 years participated in the intervention. The median time since injury at treatment onset was 95 days though the range was large (23-720 days). Treatment was on average four sessions in duration. Sessions included concussion education, activity scheduling, sleep hygiene relaxation training, and cognitive restructuring. Outcomes were measured using symptom reports on the Sports Concussion Assessment Tool - Third Edition (SCAT-3) and parent-reported quality of life on the Pediatric Quality of Life Inventory (PedsQL). Mixed-effects models revealed that symptom reports did not decrease prior to the initiation of this treatment, though significant symptom improvement occurred following treatment. Quality of life scores significantly improved across domains, with the largest gains made in the emotional and school domains. Participant characteristics including age, sex, maternal education, and previous mental health problems were not found to be significantly related to treatment outcomes. Contrary to predictions, length of time since injury was not related to symptom changes. The primary limitation of this study is that it lacks randomization and an experimental control group. The results suggest that brief cognitive behavioral intervention may be a promising treatment for children and adolescents experiencing persistent post-concussive symptoms and warrants further investigation.

Objective: To examine the relative contributions of injury characteristics and noninjury child and family factors as predictors of postconcussive symptoms (PCS) following mild traumatic brain injury (TBI) in children. Method: Participants were 8- to 15-year-old children, 186 with mild TBI and 99 with mild orthopedic injuries (OI). Parents and children rated PCS shortly after injury and at 1, 3, and 12 months postinjury. Hierarchical regression analyses were conducted to predict PCS from (1) demographic variables; (2) premorbid child factors (WASI IQ; WRAT-3 Reading; Child Behavior Checklist; ratings of preinjury PCS); (3) family factors (Family Assessment Device General Functioning Scale; Brief Symptom Inventory; and Life Stressors and Social Resources Inventory); and (4) injury group (OI, mild TBI with loss of consciousness [LOC] and associated injuries [AI], mild TBI with LOC but without AI, mild TBI without LOC but with AI, and mild TBI without LOC or AI). Results: Injury group predicted parent and child ratings of PCS but showed a decreasing contribution over time. Demographic variables consistently predicted symptom ratings across time. Premorbid child factors, especially retrospective ratings of premorbid symptoms, accounted for the most variance in symptom ratings. Family factors, particularly parent adjustment, consistently predicted parent, but not child, ratings of PCS. Conclusions: Injury characteristics predict PCS in the first months following mild TBI but show a decreasing contribution over time. In contrast, noninjury factors are more consistently related to persistent PCS. (PsycINFO Database Record (c) 2013 APA, all rights reserved). Language: en

Obstructive sleep apnea (OSA) is a nocturnal respiratory disorder associated with cognitive and behavioral sequelae, including impairments in executive functioning (EF). Previous literature has focused on “cool” EF, meaning abilities such as working memory and planning that do not involve affective control requirements. Little is known about the impact OSA may have on “hot” EF that involves regulation of affect and risk-related decision-making, and that may be particularly salient during adolescence, when these skills are rapidly developing. This study examined performance on the Iowa Gambling Task (IGT), a task believed to assess aspects of “hot” EF, in overweight adolescents at risk for OSA. Consistent with hypotheses, individuals without OSA made more beneficial decisions on the IGT over time, but participants with OSA did not benefit from feedback and continued to make choices associated with higher initial rewards, but greater long-term losses. The relationship between developmental level and IGT performance was moderated by OSA status. Individuals with OSA did not demonstrate the expected developmental gains in performance during the IGT. This finding suggests that OSA may impact the development of critical aspects of EF, or at least the expression of these skills during the developmentally important period of adolescence. (JINS, 2012, 18, 481–489)

OBJECTIVE The primary aim of the study was to investigate the relationship among executive functioning, diabetes treatment adherence, and glycemic control. RESEARCH DESIGN AND METHODS Two hundred and thirty-five children with type 1 diabetes and their primary caregivers were administered the Diabetes Self-Management Profile to assess treatment adherence. Executive functioning was measured using the Behavior Rating Inventory of Executive Functioning and glycemic control was based on A1C. RESULTS Structural equation modeling indicated that a model in which treatment adherence mediated the relationship between executive functioning and glycemic control best fit the data. All paths were significant at P < 0.01. CONCLUSIONS These results indicate that executive functioning skills (e.g., planning, problem-solving, organization, and working memory) were related to adherence, which was related to diabetes control. Executive functioning may be helpful to assess in ongoing clinical management of type 1 diabetes.

High rates of asthma treatment nonadherence have been reported, particularly in economically disadvantaged African American youth. The relationship between adherence to combined medication treatment and asthma outcomes has potential clinical significance but is not well understood. Using electronic monitoring, we describe the pattern of adherence to daily corticosteroid (fluticasone) and leukotriene receptor antagonist (montelukast) medication over the course of 1 year in a population of African American youth with moderate to severe asthma. On average, adherence to montelukast was higher than adherence to fluticasone (p0.01); however, for both medications, adherence rates significantly declined over the course of the study. After 1 year, participants took only 31% of prescribed doses of montelukast and 23% of prescribed doses of fluticasone. The decline in adherence to both fluticasone (p0.05) and montelukast (p0.001) was related to increased healthcare utilization. Furthermore, asthma symptom ratings were related montelukast (p0.001), but not fluticasone adherence. These results suggest that adherence promotion intervention strategies are warranted to improve health-related outcomes in families who are at-risk for treatment nonadherence.

Objectives The primary aims of the study were to: (a) describe the trajectories of adherence to daily inhaled corticosteroid (ICS) medication for a year in economically disadvantaged, African-American youth with asthma based on growth curve modeling; and (b) test the relationship of treatment adherence to symptom control, quick-relief medication, and healthcare utilization. Methods This prospective study measured adherence to daily ICS treatment using electronic monitoring in 92 children and adolescents with moderate to severe asthma for 9–12 months and assessed clinical outcomes, including asthma-related symptoms, quick-relief medication, and healthcare utilization. Results Youth showed a decrement in treatment adherence to less than half of prescribed corticosteroid treatment over the course of the study, which related to increased healthcare utilization (p < .04), but not to asthma symptoms or albuterol use. Conclusion Economically disadvantaged youth with asthma demonstrate high rates of chronic nonadherence that warrant identification and intervention to reduce asthma-related healthcare utilization.

Partial seizures produce increased cerebral blood flow in the region of seizure onset. These regional cerebral blood flow increases can be detected by single photon emission computed tomography (ictal SPECT), providing a useful clinical tool for seizure localization. However, when partial seizures secondarily generalize, there are often questions of interpretation since propagation of seizures could produce ambiguous results. Ictal SPECT from secondarily generalized seizures has not been thoroughly investigated. We analysed ictal SPECT from 59 secondarily generalized tonic–clonic seizures obtained during epilepsy surgery evaluation in 53 patients. Ictal versus baseline interictal SPECT difference analysis was performed using ISAS (http://spect.yale.edu). SPECT injection times were classified based on video/EEG review as either pre-generalization, during generalization or in the immediate post-ictal period. We found that in the pre-generalization and generalization phases, ictal SPECT showed significantly more regions of cerebral blood flow increases than in partial seizures without secondary generalization. This made identification of a single unambiguous region of seizure onset impossible 50% of the time with ictal SPECT in secondarily generalized seizures. However, cerebral blood flow increases on ictal SPECT correctly identified the hemisphere (left versus right) of seizure onset in 84% of cases. In addition, when a single unambiguous region of cerebral blood flow increase was seen on ictal SPECT, this was the correct localization 80% of the time. In agreement with findings from partial seizures without secondary generalization, cerebral blood flow increases in the post-ictal period and cerebral blood flow decreases during or following seizures were not useful for localizing seizure onset. Interestingly, however, cerebral blood flow hypoperfusion during the generalization phase (but not pre-generalization) was greater on the side opposite to seizure onset in 90% of patients. These findings suggest that, with appropriate cautious interpretation, ictal SPECT in secondarily generalized seizures can help localize the region of seizure onset.

To identify the clinical factors that influence the duration of postconcussion symptoms among youth referred to a sports concussion clinic.A retrospective cohort study was conducted to evaluate several potential predictors of symptom duration via a Cox proportional hazards analyses. The individual postconcussion symptom scores were highly correlated, so these symptoms were analyzed in the statistical model as coefficients derived from principal component analyses.Among 1953 youth with concussion, 1755 (89.9%) had dates of reported symptom resolution. The remainder (10.1%) were lost to follow-up and censored. The median time to recovery was 18 days (range 1-353 days). By 30 days, 72.6% had recovered; by 60 days, 91.4% had recovered; and by 90 days, 96.8% had recovered. Several variables in a multivariate Cox model predicted postconcussion symptom duration: female sex (P .001, hazard ratio [HR] = 1.28), continued activity participation (P = .02, HR = 1.13), loss of consciousness (P = .03, HR = 1.18), anterograde amnesia (P = .04, HR = 1.15), premorbid headaches (P = .03, HR = 1.15), symptom components from the day of concussion (emotion, P = .03, HR = 1.08), and the day of clinic evaluation (cognitive-fatigue, P .001, HR = 1.22; cephalalgic, P .001, HR = 1.27; emotional, P = .05, HR = 1.08; arousal-stimulation, P = .003, HR = 1.1). In univariate analyses, greater symptom scores generally predicted longer symptom durations. Worsening of symptoms from the day of concussion to the day of clinic evaluation also predicted longer recovery (P .001, HR = 1.59).Several factors help to predict protracted postconcussion symptom durations among youth referred to a sports concussion clinic.

Objective The term “post-traumatic migraine” (PTM) has been used to describe post-traumatic headaches (PTHs) that have associated migraine features, but studies of this relationship are lacking. The objective of the present study was to determine whether PTH correlates strongly with migraine symptoms among youth with concussion. Methods Twenty-three symptoms were analyzed from a retrospective cohort of 1953 pediatric patients with concussion. A principal component analysis (PCA) with oblique Promax rotation was conducted to explore underlying symptom relationships in the full cohort and in subcohorts stratified by the presence ( n = 414) or absence ( n = 1526) of premorbid headache. Results The mean patient age was 14.1 years; 63% were male. Headache was the most common postconcussion symptom, acknowledged by 69.4% of patients. When considering the full cohort, the PCA demonstrated clustering of headache with photophobia, phonophobia, nausea, dizziness, and neck pain. Similar clustering was present among patients without premorbid headaches. Repeating the analysis in the patients with preconcussion headaches led to elimination of neck pain from the cluster. Conclusions PTH correlates strongly with other migraine symptoms among youth with concussion, regardless of premorbid headaches. This clustering of migraine symptoms supports the existence of PTM as a distinct clinical entity in some patients.

Temporal lobe seizures are accompanied by complex behavioral phenomena including loss of consciousness, dystonic movements and neuroendocrine changes. These phenomena may arise from extended neural networks beyond the temporal lobe. To investigate this, we imaged cerebral blood flow (CBF) changes during human temporal lobe seizures with single photon emission computed tomography (SPECT) while performing continuous video/EEG monitoring. We found that temporal lobe seizures associated with loss of consciousness produced CBF increases in the temporal lobe, followed by increases in bilateral midline subcortical structures. These changes were accompanied by marked bilateral CBF decreases in the frontal and parietal association cortex. In contrast, temporal lobe seizures in which consciousness was spared were not accompanied by these widespread CBF changes. The CBF decreases in frontal and parietal association cortex were strongly correlated with increases in midline structures such as the mediodorsal thalamus. These results suggest that impaired consciousness in temporal lobe seizures may result from focal abnormal activity in temporal and subcortical networks linked to widespread impaired function of the association cortex.

Distinguishing psychogenic nonepileptic seizures (PNES) from epileptic seizures (ES) is a difficult task that is often aided by neuropsychological evaluation. In the present study, signal detection theory (SDT) was used to examine differences between these groups in neuropsychological performance on the Wechsler Memory Scale, Third Edition, Word List Test (WMS-III WLT). The raw WMS-III WLT scores on this task failed to discriminate the two groups; however, with the use of SDT, patients with PNES were found to have a negative response bias and increased memory sensitivity as compared with patients with ES. When patients with left (LTLE) and right (RTLE) temporal lobe epilepsy were compared, the patients with LTLE demonstrated decreased memory sensitivity but a similar response bias as compared with the patients with RTLE. Memory impairment in patients with PNES may be related to faulty decision-making strategies, rather than true memory impairment, whereas memory performance differences between the LTLE and RTLE groups are likely related to actual differences in memory abilities.

Background: Temporal lobe epilepsy (TLE) may affect brain regions outside the temporal lobe, causing impaired neocortical function during seizures.Methods: The authors selected 11 consecutive patients with mesial TLE and hippocampal sclerosis who underwent intracranial EEG monitoring and had no seizures during a follow-up period of at least 1 year after temporal lobe resection. Secondarily generalized seizures were excluded, and up to three seizures were analyzed per patient (31 seizures total). Electrode contacts were assigned to one of nine cortical regions based on MRI surface reconstructions. EEG during seizures was analyzed for specific patterns including low-voltage fast (LVF), rhythmic polyspike, spike-wave, irregular slowing, and postictal suppression.Results: Mesial and lateral temporal contacts on the side of seizure onset showed significant increases in ictal patterns such as LVF and polyspike activity, followed by postictal suppression. Bilateral frontal and ipsilateral parietal cortex exhibited large amplitude irregular slow waves during seizures. This frontoparietal slowing persisted into the postictal period. Perirolandic and occipital cortex were relatively spared. These EEG patterns were accompanied by bland staring, minor automatisms, and unresponsiveness or amnesia in the majority of patients studied.Conclusions: Prominent irregular slowing occurs in bilateral frontal and ipsilateral parietal association cortex during and after temporal lobe seizures. EEG slowing in the frontoparietal association cortex may signify physiologic impairment that contributes to widespread altered cerebral function during partial seizures.