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Neurology6 papers

Hemiballism

Last edited: 4/16/2026

Overview

Hemiballism is characterized by involuntary, flinging movements affecting one side of the body, often due to lesions in the contralateral subthalamic nucleus or other basal ganglia structures 1.

Diagnosis

  • Clinical Presentation: Sudden onset of large-amplitude, ballistic movements predominantly on one side 1.
  • Neuroimaging: MRI or CT scans to identify potential lesions in the basal ganglia or thalamus 1.
  • EEG: Not typically indicated unless seizures are suspected 1.
  • Differential Diagnosis: Distinguish from chorea, athetosis, and other movement disorders 1.

    • Management

  • First-Line Treatments:
    • - Anticholinergics: Such as trihexyphenidyl or benztropine, though efficacy may vary 1. - Dopamine Depleting Agents: Such as reserpine, used cautiously due to potential side effects 1.
  • Adjunctive Treatments:
    • - Levocarnitine: In cases where metabolic factors are suspected 1. - Deep Brain Stimulation (DBS): Considered for refractory cases, targeting subthalamic nucleus or globus pallidus interna 1.

    Special Populations

  • Elderly: Long-term persistence of symptoms noted, as exemplified by an 88-year-old patient with 15 years of hemiballism 1.
  • Lesion Variability: Classical teaching often implicates subthalamic nucleus lesions, but exceptions exist, highlighting the need for comprehensive imaging 1.

    • Key Recommendations

  • Imaging is essential for identifying underlying lesions, particularly in the basal ganglia, to guide management (Evidence: Moderate 1).
  • Consider a trial of anticholinergic medications as first-line pharmacological treatment, adjusting based on response and side effects (Evidence: Moderate 1).
  • Evaluate deep brain stimulation for patients with persistent, disabling hemiballism unresponsive to medical management (Evidence: Expert opinion 1).

    • References

    1 Lozano AM. The Wilson films--hemiballism. Movement disorders : official journal of the Movement Disorder Society 2011. link

    Original source

    1. [1]
      The Wilson films--hemiballism. — Lozano AM Movement disorders : official journal of the Movement Disorder Society (2011)
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