hemiballismus

(redirected from Ballism)
Also found in: Medical, Wikipedia.

hemiballismus

[¦he·mē·bə′liz·məs]
(medicine)
Sudden, violent, spasmodic movements involving particularly the proximal portions of the extremities of one side of the body; caused by a destructive lesion of the contralateral subthalamic nucleus or its neighboring structures or pathways.
References in periodicals archive ?
They experienced severe involuntary movements in the form of chorea or dystonia or ballism or tremor and they did not respond to appropriate prior other medical treatments (anticholinergics, conventional neuroleptics, benzodiazepines).