Myoclonic : A sudden, involuntary twitching of muscles or parts of muscles, without any rhythm or pattern, occurring in various disorders of the nervous system
National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC), The Emergency Response Safety and Health Database, Atlanta, GA, USA 2014. http://www.cdc.gov/NIOSH/ershdb/glossary.html#B, (Emr Resp Sfty and Hlth Database - Amer) {794}