Term: myoclonus
Literally meaning: “muscle agitation”
Origin: Anc Greek
myo-> μυο-/myo-(=comping form meaning muscle) > μυς/mys/
(=muscle)
> μύω/myo(=enclosed like the muscle inside body or rat in
its nest=epimys)
-clonus> κλονώ/clono(=unsettle,
shake)
Coined/History
Nikolaus Friedreich (1825-1882) described in 1881 the “paramyoclonus multiplex” for a sporadic non progressive form of
myoclonus and 10 years later Heinrich Unverricht
(1853 - 1912) described
“the familial myoclonic epilepsy”.
R Guerrini et al, Epilepsy and Movement Disorders, 2002 Cambridge
University Press
Definition
Myoclonus is a symptom of heterogeneous group of diseases which
is characterized by a brief and sudden involuntary
jerking or t twitching of a muscle or group of muscles.
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