Kovac, Stjepana and Diehl, Beate and Wehner, Tim and Fois, Chiara and Toms, Nathan and Walker, Matthew C. and Duncan, John S. (2015) Gelastic seizures: incidence, clinical and EEG features in adult patients undergoing video-EEG telemetry. Epilepsia, Vol. 56 (1), e1-e5. ISSN 0013-9580. eISSN 1528-1167. Article.
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This study aimed to determine clinical features of adult patients with gelastic seizures recorded on video –electroencephalography (EEG) over a 5-year period. We screened video-EEG telemetry reports for the occurrence of the term “gelastic” seizures, and assessed the semiology, EEG features, and duration of those seizures. Gelastic seizures were identified in 19 (0.8%) of 2,446 admissions. The presumed epileptogenic zone was in the hypothalamus in one third of the cases, temporal lobe epilepsy was diagnosed in another third, and the remainder of the cases presenting with gelastic seizures were classified as frontal, parietal lobe epilepsy or remained undetermined or were multifocal. Gelastic seizures were embedded in a semiology, with part of the seizure showing features of automotor seizures. A small proportion of patients underwent epilepsy surgery. Outcome of epilepsy surgery was related to the underlying pathology; two patients with hippocampal sclerosis had good outcomes following temporal lobe resection and one of four patients with hypothalamic hamartomas undergoing gamma knife surgery had a good outcome.
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