Background

The background EEG is normal.

Interictal

The interictal EEG is usually normal. If abnormality is seen this is characterized by focal (usually temporal) epileptiform abnormalities; these may also be widespread.

Activation

EEG abnormality is enhanced by sleep deprivation, in drowsiness and in sleep. EEG abnormality may be activated by hyperventilation.

Ictal

There are inadequate published records of ictal EEG in this syndrome.