Generalized non-motor (absence) seizure Typical absence seizure SNOMEDCT_US:50866000 2011-10-18T01:52:22Z SNOMEDCT_US:230413002 Typical absence A typical absence seizure is a type of generalized non-motor (absence) seizure characterized by its sudden onset, interruption of ongoing activities, a blank stare, possibly a brief upward deviation of the eyes. Usually the patient will be unresponsive when spoken to. Duration is a few seconds to half a minute with very rapid recovery. Although not always available, an EEG would usually show 3 Hz generalized epileptiform discharges during the event. UMLS:C0014553 In 2017 the ILAE Commission for Classification and Terminology recommended classifying a seizure as having focal or generalized onset only when there is a high degree of confidence (>80%, arbitrarily chosen to parallel the usual allowable beta error) in the accuracy of this determination; see Dialeptic seizure. Typical absences have 2 essential components: (1) clinically the impairment of consciousness (absence), and (2) EEG generalized 3 Hz to 4 Hz (less than 2.5 Hz) spike and slow wave discharges. HP:0011147 SNOMEDCT_US:79631006 SNOMEDCT_US:432241000124101