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Ann Neurol. 1994 Jan;35(1):45-52.

Cerebellar hypermetria is larger when the inertial load is artificially increased.

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Department of Neurology, H├┤pital Civil de Charleroi, Belgium.


Hypermetria is a classical cerebellar symptom designating the overshoot observed when a patient is asked to make a very fast and accurate movement. The movement studied here was wrist flexion. Hypermetria was found to be increased by artificially increasing the inertia of the moving hand. A normal subject adapted himself to increasing inertia by increasing both his agonist activity (the launching force) and its antagonist activity (the braking force). In the same circumstances, a patient with symptoms of cerebellar system dysfunction was found to be able to increase his agonist activity but not his antagonist activity.

[Indexed for MEDLINE]

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