Hereditary essential myoclonus.
A new family with the rate condition of hereditary essential myoclonus (HEM) and the literature on HEM are presented. Some of these cases may previously have been reported under the title of Friedreich's paramylclonus multiplex. The present family, which is number 13 in the literature and in which 9 members in three generations had this benign disorder, is described. The diagnostic criteria have been tabulated.
D000328:Adult; D000368:Aged; D006801:Humans; D008875:Middle Aged; D009207:Myoclonus / Q000175:diagnosis / Q000235:genetics*