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Hemiataxia-hypesthesia: a thalamic stroke syndrome.
1Department of Neurology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
Journal of Neurology, Neurosurgery, and Psychiatry
|July 1, 1992
Summary
This study identifies a new stroke syndrome, hemiataxia-hypesthesia, resulting from thalamic infarction. This condition affects coordination and sensation, with sensory loss often improving while ataxia persists.
Area of Science:
- Neurology
- Neuroscience
- Stroke Medicine
Background:
- Thalamic strokes can present with diverse neurological deficits.
- The specific syndrome of hemiataxia-hypesthesia has not been well-characterized.
Purpose of the Study:
- To describe a novel stroke syndrome: acute hemiataxia-hypesthesia.
- To investigate the clinical features, neuroimaging findings, and etiology of this syndrome.
Main Methods:
- Retrospective analysis of stroke cases from the Lausanne Stroke Registry.
- Clinical assessment of neurological deficits (ataxia, sensory loss).
- Lesion mapping using CT or MRI.
Main Results:
- Six patients presented with isolated hemiataxia and ipsilateral sensory loss due to thalamic infarction.
- Sensory deficits varied in type and severity, with one purely subjective disturbance.
- All affected patients had lesions in the lateral thalamus (ventral posterior and ventral lateral nuclei).
- Causes included cardioembolism, posterior cerebral artery occlusion, meningovascular syphilis, and small vessel disease.
Conclusions:
- Hemiataxia-hypesthesia represents a distinct stroke syndrome affecting thalamic perforating branches.
- Small vessel disease may not be the primary cause in all cases of this syndrome.