For the purposes of this study, the peri-ictal state is defined as the subject's immediate post-ictal state following a generalized tonic-clonic (GTC) seizure or focal seizure with impaired awareness up to 5 minutes following the last clonic jerk. This may also be defined as less than 5 minutes after cessation of the seizure (GTC or focal seizure with impaired awareness) as verified via EEG.