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Dysmetria

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Updated January 07, 2008

Definition: A lack of ability to coordinate movements, which is exhibited by the person “overshooting” (hypermetria) or “undershooting” (hypometria) the intended position of the hand, arm or leg.

In multiple sclerosis (MS), dysmetria usually indicates demyelination in the cerebellum, but can also be caused by lesions on the nerves leading to and from the cerebellum.

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