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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

February 26th 2024



n. a feeling of intense pleasure and elation, including that experienced in some mystical states, during orgasm, with aesthetic reveries, and in drug-induced states. Such extreme euphoria also may occur in the context of a hypomanic episode or a manic episode. —ecstatic adj.


n. the popular name for MDMA.