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Acute hemichorea due to infarction in the corona radiata
F Barinagarrementeria1, F Vega, O H DelBrutto
1Division of Neurology, Instituto Nacional de Neurologia y Neurocirurgia, Mexico, D.F.
Journal of Neurology
|September 1, 1989
Insights
A hypertensive patient experienced acute hemichorea due to a stroke in the corona radiata. This case suggests subcortical lesions, not directly affecting the basal ganglia, can cause movement disorders.
Area of Science:
- Neurology
- Neuroscience
- Radiology
Background:
- Hemichorea is a rare hyperkinetic movement disorder.
- Hypertension is a significant risk factor for cerebrovascular events.
Observation:
- A 66-year-old male with hypertension presented with sudden onset hemichorea.
- Brain MRI revealed an infarct in the contralateral corona radiata.
Findings:
- The infarct disrupted excitatory corticostriate fibers.
- The lesion was subcortical, without direct basal ganglia involvement.
Implications:
- Subcortical lesions can cause movement disorders like hemichorea.
- This finding expands the understanding of the neuroanatomy of movement control.
- Highlights the importance of neuroimaging in diagnosing movement abnormalities.
Abstract:
A 66-year-old hypertensive man presented with acute hemichorea. Magnetic resonance imaging disclosed an infarct, confined to the contralateral corona radiata, that interrupted excitatory corticostriate fibres. The movement disorder may have been caused by subcortical lesion without direct involvement of the basal ganglia.