subclinical absence

English Thesaurus

1. a transient impairment of cortical function demonstrable only by 3-per-second brainwave spikes (noun.state)

hypernym	:	absence, absence seizure,
definition	:	the occurrence of an abrupt, transient loss or impairment of consciousness (which is not subsequently remembered), sometimes with light twitching, fluttering eyelids, etc.; common in petit mal epilepsy (noun.state)