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violent motor restlessness of half of the body, most marked in the upper limbs.
Ballism involving one side of the body.
[hemi- + G. ballismos, jumping about]
hemiballismNeurology A hyperkinetic movement disorder characterized by violent flailing movements of the arm and leg contralateral to a lesion–hemorrhage or infarction, or rarely tumor of the subthalamic nucleus; hemiballism follows recovery from a stroke-induced hemiparesis and hemisensory defect Clinical Motor Sx may have a rotatory component in the shoulder or hip, accompanied by choreiform movements–repeated flexion and extension of hands and feet; movements usually disappear during sleep Management Neuroleptics–eg, chlorpromazine, haloperidol, reserpine, antipsychotics, or other agents that interfere with dopamine transmission–eg, reserpine
violent motor restlessness of half of the body, most marked in the upper extremity.