Hemiataxia
Pronunciation: hem-ee-uh-TAK-see-uh
Unilateral ataxia affecting one side of the body, typically resulting from cerebellar or brainstem lesions.
Full Definition
Hemiataxia is a neurological condition characterized by ataxic movements affecting only one side of the body, contrasting with the bilateral involvement seen in typical cerebellar ataxia. This condition most commonly results from unilateral cerebellar lesions, brainstem strokes affecting cerebellar pathways, or thalamic lesions disrupting cerebellar-thalamic connections. Patients exhibit coordination difficulties, dysmetria, and intention tremor on the affected side while maintaining normal coordination on the unaffected side. Hemiataxia can significantly impact functional activities requiring bilateral coordination and requires specialized therapeutic approaches that address unilateral motor control deficits while utilizing the intact side for compensation strategies.
Usage
Usage note: Specify affected side clearly; important for therapy planning and prognosis.
In Context
- "The patient developed left hemiataxia following a right cerebellar stroke, affecting coordination during bilateral reaching tasks." — Physical therapy evaluation
- "Hemiataxia was evident in finger-to-nose testing on the right side while left-sided coordination remained intact." — Neurological examination