Berk, T; Friedman, D; Gazzola, D; Dugan, P; Carlson, C; Kuzniecky, R; French, J
"Semiologic stratification of generalized tonic clonic seizures" [Meeting Abstract]
Epilepsy currents 2013 March-April 2013; 13():212-212
- Rationale: The Generalized Tonic-Clonic Convulsion (GTCC) has been described as a stereotyped seizure consisting of a symmetric tonic posture, followed by vibratory and clonic phases - defined as movements at a frequency of >5 Hz and <5 Hz respectively. We examined how frequently the classic GTCC occurs in a population and what factors, if any, contributed to deviations from this pattern. Methods: We reviewed the video EEG of 100 consecutive inpatients of the NYU Comprehensive Epilepsy Center that had bilateral limb movements as part of their seizure semiology. Each seizure was reviewed by 2 reviewers; any records in which the patient was obscured on the video were excluded from further analysis. Any seizure with bilateral symmetric tonic, vibratory and clonic phases in that order was categorized as "typical GTCC" (tGTCC), if one phase was absent, asymmetric or in the wrong order of progression it was considered "atypical GTCC" (aGTCC), if two phases were absent it was not a GTCC (nGTCC). All aGTCC were reviewed by at least 3 reviewers. Results: 104 seizures (41 from women) from 100 patients were reviewed, 2 patients were excluded due to obscured video. 45 had a tGTCC while 15 were aGTCC, and 42 were nGT
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