Burst attenuation/suppression modifiers

Criteria & assessment

• Burst averages >=0.5 s and has >=4 phases (>=3 baseline crossings); maximum duration 30 s.
• Report location as generalized, lateralized, bilateral independent, unilateral independent, or multifocal; report typical burst/interburst durations and sharpest component.
• Highly epileptiform: >=2 spikes/sharp waves in most (>50%) bursts at mean >=1 Hz within a burst, where frequency = 1 / typical interpeak latency; alternatively a rhythmic potentially ictal-appearing pattern occurs in most (>50%) bursts. Table 1 states >=1 Hz for this alternative, while A.4.d does not repeat that cutoff. Record frequency and location.
• Identical: first >=0.5 s of each burst, or each stereotyped cluster of >=2 bursts, is visually similar in all channels in most (>90%) bursts.