A 1-year old child presented with myoclonic jerks. The EEG done shows?: (A) Normal record, (B) Hypsarrhythmia, (C) Periodic spike-wave pattern, (D) Burst suppression pattern
Answer is B. Criteria for Hypsarrhythmia: 1. Essentially continuous electrical discharge. 2. Present in both wakefulness and sleep. 3. Consist of random high voltage slow waves and spikes. 4. Spikes vary in location and duration: focal or multifocal. 5. Occasionally generalized discharges but never in a rhythmic or highly organized pattern Periodic spike-wave pattern is seen with Prion disease Burst suppression pattern is seen with Cerebral Anoxia or bih asphyxia.