The day following our return from our New York City Christmas Holiday, Chris had an ambulatory electroencephalogram (EEG.) This EEG was performed to detect the activity in his brain. Flat, metal discs (electrodes) were attached to his scalp. His brain activity was recorded through electrical impulses. The activity shows up as wavy lines on an EEG recording. The EEG is one of the main diagnostic tests for epilepsy.