[Apparently critical posterior activity in a non-epileptic subject: variations during wakefulness and sleep (author's transl)].

Sub-clinical critical discharges arising from the posterior temporal or temporo-occipital regions, which were bilateral but independent, were seen at each examination (5) of a 13 year old non-epileptic child over a period of more than a year. The discharges were present during wakefulness and while falling asleep. They were blocked during the deep slom-ware stage and paradoxical phase of sleep. They were not modified by anti-convulsant therapy and there was no previous family history. Their relation to Gibb's "Psychomotor variant discharge" is envisaged.