Absence seizure
A seizure that takes the form of a staring spell. The person suddenly seems to be “absent.” An absence seizure involves a brief loss of awareness, which can be accompanied by blinking or mouth twitching. Absence seizures have a very characteristic appearance on an electroencephalogram (EEG).

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ab·sence seizure 'ab-sən(t)s- n a nonconvulsive generalized seizure that is marked by the transient impairment or loss of consciousness usu. with a blank stare, that begins and ends abruptly and is usu. unremembered afterward, and that is seen chiefly in mild types of epilepsy called also absence, petit mal

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the seizure seen in absence epilepsy, consisting of a sudden momentary break in consciousness of thought or activity, sometimes accompanied by automatisms or clonic movements, especially of the eyelids. On the electroencephalogram it is characterized by a specific symmetrical spike and wave type occurring at three cycles per second; see illustration at epileptiform activity, under activity. Called also absence.

Medical dictionary. 2011.

Look at other dictionaries:

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