extensor rigidity

rigid contractions of extensor muscles. The kind of rigidity sometimes indicates the site of the motor neuron lesion associated with the disorder. Injury to the cerebellum produces increased tone of extensor muscles, called cerebellar rigidity. See also decerebrate rigidity.

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Psychology term of the day

November 22nd 2024

cortical–subcortical motor loop

a loop, made up of projections between the motor cortex and structures in the basal ganglia and the thalamus, that monitors and sequences ongoing motor behaviors.