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Typical absence seizure of childhood absence epilepsy (ictal EEG) (2)

Note the regular rhythm of the discharge, the constant spike-and-slow wave relation, and the abrupt onset. The opening phase is often variable and unreliable. The child remains unresponsive from the onset of the initial to the onset of the terminal phase of the discharge. However, she is able to understand the technologist during the terminal phase when the ictal discharge is waning out. (Contributed by Dr. C P Panayiotopoulos.)