ataxia
Pronunciation: uh-TAK-see-ah
Lack of coordination and irregularity of voluntary movements, often indicating cerebellar dysfunction.
Full Definition
Ataxia is a neurological condition characterized by lack of coordination and irregularity of voluntary movements, resulting from dysfunction of the cerebellum, sensory pathways, or vestibular system. It manifests as unsteady gait, impaired fine motor control, dysmetria (inability to judge distance), and intention tremor. Ataxia can be hereditary or acquired, acute or chronic. Clinical assessment involves standardized tests of coordination, balance, and motor control. The term encompasses various subtypes including cerebellar, sensory, and vestibular ataxia.
Usage
Usage note: Specify type (cerebellar, sensory, vestibular) and describe specific manifestations observed.
In Context
- "The patient exhibited truncal ataxia with wide-based gait and frequent falls." — Neurology consultation note
- "Genetic testing confirmed hereditary spinocerebellar ataxia type 3." — Genetics clinic report