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Stereotactic Vim-Vo-thalamotomy for choreatic movement disorder.
Y Kawashima1, A Takahashi, M Hirato
1Department of Neurosurgery, Gunma University, Japan.
Acta Neurochirurgica. Supplementum
|January 1, 1991
Summary
Vim-Vo thalamotomy effectively treated hemichorea and levodopa-induced dyskinesia (DID). This surgical intervention, targeting the ventro-oral (Vo) and ventro-intermedius (Vim) nuclei of the thalamus, abolished involuntary movements.
Area of Science:
- Neurology
- Neurosurgery
- Movement Disorders
Background:
- Hemichorea and dopa-induced dyskinesia (DID) are debilitating movement disorders.
- Current treatment options may have limitations or side effects.
Observation:
- Two patients with hemichorea and DID underwent Vim-Vo thalamotomy.
- Pre-operative MRI and PET findings varied due to underlying conditions.
- High electrical activity in the Vo and Vim thalamic nuclei was observed in patients with hemichorea.
Findings:
- Vim-Vo thalamotomy successfully abolished choreatic movements in both cases.
- The procedure primarily affected the Vo nucleus after physiological identification of the Vim nucleus.
- Observed electrical activity in Vo may correlate with the pathophysiology of chorea.
Implications:
- Vim-Vo thalamotomy is a viable surgical option for refractory hemichorea and DID.
- Understanding thalamic activity may offer insights into movement disorder mechanisms.
- This approach highlights the potential of targeted neuromodulation for movement disorders.