Attribute 1: Morphology ::= represents the type or “form” of EEG waves. Rhythm: continuous, rhythmic activity Transient Single Wave: □ V wave □ Wicket spikes □ Spike □ Sharp wave □ Slow wave Complex: A sequence of two or more waves having a characteristic form or recurring with a fairly consistent form, distinguished from background activity. □ K-complex □ Sleep spindles □ Spike-and-sharp-wave complex □ Spike-and-slow-wave complex □ Sharp-and-slow-wave complex □ Triphasic wave □ Polyspike complex □ Polyspike-and-slow-wave complex Pattern: any characteristic EEG Activity □ Suppression □ Amplitude Gradient □ Slowing □ Breach Rhythm □ Benign Epileptic Transients of Sleep (BETS) □ Photic driving (response) □ Periodic Laterilized Epilepitiform Discharges (PLEDs) □ Generalized periodic epileptiform discharges (GPEDs) □ Epileptiform discharge (unspecified) □ Disorganization □ Positive occipital sharp transients of sleep (POSTS) □ Unspecified: the default attribute value, used if no morphological information is given at all