[Dyskinesia in metabolic encephalopathy].

We have described several kinds of involuntary movements occurring in metabolic encephalopathies. They are often associated with slowing of electroencephalographic basic activities and with loss of consciousness. Laboratory studies disclose the cause of the encephalopathies. Asterixis, first reported in hepatic encephalopathy, is produced by EMG silence during voluntary contraction. Myoclonus is associated with a short excessive EMG discharges. Tremor is caused by grouping EMG discharges. Some other kinds of involuntary movements are seen in metabolic encephalopathies. Clinical features of hepatic, uremic, hypoxic, and hypoglycemic encephalopathies are briefly described.