decerebrate rigidity

decerebrate rigidity
an abnormal body posture produced by decerebration. In experimental animals it is marked by rigid extension of the lower limbs (hindlimbs in a quadruped). In humans it is manifested by the person lying in rigid extension with the upper limbs internally rotated at the shoulders and pronated; elbows, knees, and hips rigidly extended; and fingers, ankles, and toes flexed. Called also decerebrate or extensor posturing.

(A), Decerebrate rigidity; (B), decorticate rigidity.

Medical dictionary. 2011.

Look at other dictionaries:

  • decerebrate animal — an experimental animal that has been subjected to decerebration; such an animal exhibits rigid extension of the lower limbs, with strong tonic contraction of the extensor muscles and to some extent the flexor muscles. See also decerebrate, and… …   Medical dictionary

  • decerebrate — 1. To cause decerebration. 2. Denoting an animal so prepared, or a patient whose brain has suffered an injury which renders the patient, in neurologic behavior, comparable to a d. animal. * * * de·cer·e·brate ( )dē ser ə brət, .brāt; .dē sə r …   Medical dictionary

  • decerebrate — I. adjective Date: 1897 1. characteristic of decerebration < decerebrate rigidity > 2. having the cerebrum removed or made inactive II. transitive verb Date: circa 1900 to remove the cerebrum from; also to make incapable of cerebral activity •… …   New Collegiate Dictionary

  • rigidity — 1. Stiffness or inflexibility. SYN: rigor (1). 2. In psychiatry and clinical psychology, an aspect of personality characterized by an individual s resistance to change. 3. In neurology, one type of increase in …   Medical dictionary

  • decerebrate posturing — see under rigidity …   Medical dictionary

  • clasp-knife rigidity — an exaggerated stretch reflex of skeletal muscles seen in spasticity and decerebrate rigidity, resembling the opening of a penknife or clasp knife; there is increased resistance to the extensors (induced by passive flexion of a joint), which… …   Medical dictionary

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  • Decerebration — For decerebrate response, see abnormal posturing. Decerebration is the elimination of cerebral brain function in an animal by removing the cerebrum, cutting across the brain stem, or severing certain arteries in the brain stem. Decerebration… …   Wikipedia

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