Hemiballismus is a large amplitude, proximal, choreiform movement disorder which affects the shoulder and upper arm and sometimes the hip and leg on one side of the body. In some cases, the involuntary movements are smaller in amplitude and less violent but still primarily proximal in location. In cases where milder and more distal choreiform movements predominate, this is referred to as hemichorea. The most common causes are ischemic or hemorrhagic lesions of the contralateral subthalamic nucleus or its connections with the globus pallidus, often among patients with hypertension or diabetes. Small striatal infarcts may also cause hemichorea or hemiballismus.
KeywordsDeep Brain Stimulation Brain Abscess Involuntary Movement Sodium Valproate Left Shoulder
Hemichorea-hemiballismus.mp4 (MP4 5,168KB)
The patient shows intermittent proximal and distal ballistic, dystonic, and choreiform movements involving left shoulder and wrist.