Myoclonus is brief, involuntary twitching of a muscle or a group of muscles.
It describes
a symptom (as opposed to medical sign)
and, generally,
is not
a diagnosis of
a disease. '
'Myoclonus may develop in response to infection, head or spinal cord injury, stroke, brain tumors, kidney or liver failure, lipid storage disease, chemical or drug poisoning, or other disorders.