An atypical form of familial myoclonus epilepsy. A case report.

A case of familial myoclonus epilepsy with progressive mental deterioration is presented. The genetic pattern, symptomatology, EEG recording and good response to anticonvulsant medication are discussed. This case does not conform to any known form of familial myoclonus epilepsy and is most probably an atypical form of paramyoclonus multiplex.