Ictal EEG. EEG during a seizure (red bar) arising from light sleep. Initially, there is emergence of theta/alpha range frequencies broadly over the left temporal region, maximal at electrodes F7 and T3 (a). Left temporal waveforms become rhythmic (b) and evolve in frequency and amplitude while acquiring sharpened elements (c) before return to interictal background (d). Clinically, the patient was observed to have lip-smacking automatisms during this seizure.