1. The SSS phenomenon is defined as a pair of sequential ictal potentials separated by complete or almost complete cessation of seizure activity; the SSS phenomenon was found on subdural recordings in 23% of 98 patients.237 The two phases were morphologically similar. The first “start” usually had a narrow field.241 Fifty-eight percent of SSS seizures showed a complete stop. Thirty-five percent of patients and seizures restarted in a different location than the first start. When in different locations, the start, not the restart, is correlated with the non-SSS origin. SSS seizures arose in the same region as non-SSS seizures in almost all patients.237 Subsequently, the SSS phenomenon was also observed in scalp EEG, sphenoidal, and foramen ovale electrodes, and the recognition of the phenomenon may improve the accuracy of seizure localization.241,242
Source: Focal Epilepsy, Atlas of Pediatric EEG
Citation: Laoprasert P. Atlas of Pediatric EEG; 2011 Available at: Accessed: November 02, 2017
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