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Ataxia (from Greek α- [a negative prefix] + -τάξις [order] = "lack of order") is a neurological sign consisting of lack of voluntary coordination of muscle movements that can include gait abnormality, speech changes, and abnormalities in eye movements, that indicates dysfunction of parts of the nervous system that coordinate movement, such as the cerebellum.
As a stand-alone condition, "ataxia is a degenerative disease of the nervous system," explains Andrew Rosen, chief executive officer of the National Ataxia Foundation. There are many types ...
Truncal ataxia (or trunk ataxia) is a wide-based "drunken sailor" gait characterized by uncertain starts and stops, lateral deviations and unequal steps. It is an instability of the trunk and often seen during sitting. [ 2 ]
Persons who have been diagnosed with autosomal dominant spinocerebellar ataxia (SCAs) also exhibit dysmetria. [4] There are many types of SCAs and though many exhibit similar symptoms (one being dysmetria), they are considered to be heterogeneous. [4] Friedreich's ataxia is a relatively common cause of dysmetria. [5]
Limb-kinetic apraxia is having the inability to perform precise, voluntary movements of extremities. For example, a person affected by limb apraxia may have difficulty waving hello, tying shoes, or typing on a computer. [12] [8] This type is common in patients who have experienced a stroke, some type of brain trauma, or have Alzheimer's disease ...
cerebellar ataxia a gait with a broad base; the patient falters to the side of the lesion ; inability to coordinate fine motor activities (intention tremor), e.g. "past-pointing" (pointing beyond the finger in the finger-nose test) inability to perform rapid alternating movements (dysdiadochokinesia), e.g. inability to rapidly flip the hands
Spinocerebellar ataxia (SCA) is a progressive, ... dysarthria, slowly progressive gait and limb ataxia with severe dysmetria in the lower extremities, mild dysmetria ...
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