Cerebellar hypermetria associated with a selective decrease in the rate of rise of antagonist activity.
Classically, cerebellar hypermetria observed during fast and accurate movements is ascribed to a delayed onset of the electromyographic activity of the antagonist muscle. We describe here 3 patients presenting a late-onset cerebellar degeneration and exhibiting a hypermetria during their fast and accurate movements in spite of a normal onset latency of the antagonist activity. Hypermetria was found to be due to a slower rate of rise of the antagonist activity.
Manto
M
M
Department of Neurology, Hôpital Erasme, Bruxelles, Belgium.
Godaux
E
E
Jacquy
J
J
Hildebrand
J
J
D000328:Adult; D000368:Aged; D002526:Cerebellar Diseases / Q000150:complications*; D004576:Electromyography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement; D009069:Movement Disorders / Q000209:etiology* / Q000503:physiopathology*; D009132:Muscles / Q000503:physiopathology*; D009410:Nerve Degeneration; D011930:Reaction Time; D012016:Reference Values; D013997:Time Factors