Publications by authors named "Katrina Boyer"

Introduction: Optimizing cognitive outcomes of pediatric epilepsy surgery requires understanding of risk for change in function, typically based on hemispheric lateralization of language skills. Identification of cognitive lateralization in children is complicated by disease in the setting of ongoing functional development. A quantitative method for assessing lateralization, the Cognitive Lateralization Rating Index (CLRI), was used as a systematic way to assess lateralized cognitive dysfunction in a sample of pediatric epilepsy surgery candidates.

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Objective: Surgery is a standard treatment for medically refractory epilepsy, and many factors contribute to determining surgical approaches. The Cognitive Lateralization Rating Index (CLRI) quantifies the degree of dysfunction evident and can suggest atypical neuroanatomical functional organization if dominant skills remain despite left-hemisphere seizure foci (i.e.

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Objective: Sturge-Weber syndrome (SWS) is a neurocutaneous disorder caused by a somatic mosaic mutation in the GNAQ gene. Epilepsy is seen in 75%-80% of children with SWS, and they are at high risk of early onset seizures, status epilepticus, and drug-resistant epilepsy. Epilepsy surgery is an effective treatment, but timing and candidacy for epilepsy surgery remain controversial in this patient population.

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Background: Febrile-infection related epilepsy syndrome (FIRES) is a rare epilepsy syndrome in which a previously healthy individual develops refractory status epilepticus in the setting of a preceding febrile illness. There are limited data regarding detailed long-term outcomes. This study aims to describe the long-term neuropsychological outcomes in a series of pediatric patients with FIRES.

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Objective: Improve data-driven research to inform clinical decision-making with pediatric epilepsy surgery patients by expanding the Pediatric Epilepsy Research Consortium Epilepsy Surgery (PERC-Surgery) Workgroup to include neuropsychological data. This article reports on the process and initial success of this effort and characterizes the cognitive functioning of the largest multi-site pediatric epilepsy surgery cohort in the United States.

Methods: Pediatric neuropsychologists from 18 institutions completed surveys regarding neuropsychological practice and the impact of involvement in the collaborative.

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Unlabelled: Neurocognition in Childhood Epilepsy: Impact on Mortality and Complete Seizure Remission 50 Years Later Sillanpää M, Saarinen MM, Karrasch M, Schmidt D, Hermann BP. Epilepsia. 2019;60(1):131-138.

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Purpose: This study aimed to evaluate lexical retrieval, presurgery and postsurgery, among children and adolescents who had undergone temporal lobe resection for intractable epilepsy and to compare outcomes in patients whose surgery involved the left temporal lobe or the right temporal lobe.

Materials And Methods: A retrospective chart review identified 36 patients from a major pediatric epilepsy treatment center who had undergone temporal lobe resection (21 underwent left temporal lobe resection; 15 underwent right temporal lobe resection) for intractable epilepsy and who had completed neuropsychological testing that included a measure of confrontation naming (Boston Naming Test, BNT) and verbal fluency (Delis-Kaplan Executive Function System (D-KEFS) Fluency) prior to and after surgery. Linear mixed effects regression models were used to evaluate presurgery and postsurgery changes and to compare the left temporal lobe resection group with the right temporal lobe resection group.

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In this study we validate passive language fMRI protocols designed for clinical application in pediatric epilepsy surgical planning as they do not require overt participation from patients. We introduced a set of quality checks that assess reliability of noninvasive fMRI mappings utilized for clinical purposes. We initially compared two fMRI language mapping paradigms, one active in nature (requiring participation from the patient) and the other passive in nature (requiring no participation from the patient).

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Children with benign rolandic epilepsy (BRE) experience elevated rates of cognitive, behavioral, and affective problems. Frequent epileptiform spike discharges may impair behavioral functioning. To elucidate this relationship, we evaluated associations between the EEG spike frequency index (SI) and parental ratings of psychosocial adjustment and executive functioning in school-aged children with EEGs typical of BRE.

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We assessed the impact of age at onset of epilepsy and duration and frequency of seizures on cognitive development in children less than 3 years old. Retrospective analysis was conducted on clinical data and neuropsychological testing of 33 infants with epilepsy. Developmental quotients were calculated and were correlated with age at epilepsy onset, duration of epilepsy, seizure frequency, brain pathology, and types of seizures (with/without spasms) as potential predictors.

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Satisfaction with pediatric neuropsychological evaluations was surveyed by asking parents or guardians of children who completed pediatric neuropsychological evaluations at a large children's hospital over a 2-year period to complete a 30-item rating scale. The scale included items drawn from published measures of consumer satisfaction, and incorporated a well-validated measure of general satisfaction. A total of 338 surveys were distributed, with 117 completed, for a return rate of 35%.

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Objective: Attention-deficit hyperactivity disorder (ADHD) coexisting with epilepsy is poorly understood; thus, we compared the clinical correlates and psychiatric comorbid conditions of 36 children with epilepsy and ADHD aged 6 to 17 years enrolled in an ADHD treatment trial, with those reported in the literature on children with ADHD without epilepsy.

Methods: Measures included the Kiddie Schedule for Affective Disorders and Schizophrenia for School-Age Children (KSADS), the Wechsler Abbreviated Scale of Intelligence (WASI), and the Scales for Independent Behavior-Revised (SIB-R).

Results: Mean IQ was 86+/-19, and SIB-R Standard Score was 72+/-26.

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Working memory and information processing speed were examined in children with myelomeningocele and shunted hydrocephalus using the Children's Paced Auditory Serial Addition Test (CHIPASAT). The CHIPASAT was administered to 31 children with myelomeningocele and shunted hydrocephalus and 27 healthy siblings, all between 8 and 15 years of age. They also completed other standardized measures of working memory and processing speed.

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