1. Generalized, frontally predominant, rhythmic fast activity is the most common ictal EEG accompaniment of generalized tonic seizures. Ictal EEG patterns in asymmetrical tonic seizures reveal initial high-amplitude slow-wave transients or midline sharp waves followed by bilateral fronto-central low-voltage fast activity or electrodecrement. Electrodecrement usually evolves into low-voltage fast activity and then bilateral fronto-central or generalized rhythmic theta slowing. Lateralization of these rhythms may be noted but is usually minimal.164
Source: Focal Epilepsy, Atlas of Pediatric EEG
Citation: Laoprasert P. Atlas of Pediatric EEG; 2011 Available at: Accessed: October 18, 2017
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