| decerebrate posture |
The rigid body position assumed by a patient who has lost cerebral control of spinal reflexes, usually as a result of an intracranial catastrophe. The patient's arms are stiff and extended, the forearms are pronated, and the
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| decerebrate a. |
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 see decerebrate rigidity, under rigidity.
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| decerebrate r. |
the posture produced in an experimental animal by decerebration (q.v.), marked by rigid extension of the lower limbs. In humans it occurs as a result of lesions of the upper part of the brain stem or of severe bilateral lesions of the cerebrum and is manifested as a posture of lying in rigid extension with upper limbs internally rotated at the shoulders and pronated; elbows, knees, and hips rigidly extended; and fingers, ankles, and toes flexed. Cf. antigravity reflex.
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