According to Sherrington, the decerebrate rigidity is characterized by all except
Correct Answer: Rigidity occurs in all muscles of body
Description: The Decerebrate Animal Develops Spastic Rigidity when the brain stem of an animal is sectioned below the midlevel of the mesencephalon but the pontine andmedullary reticular systems, as well as the vestibular system, are left intact, a condition called decerebrate rigidity develops. This rigidity does not occur in all the muscles of the body, but it does occur in the antigravity muscles-- the muscles of the neck and trunk and the extensors ofthe legs.The cause of decerebrate rigidity is blockage of normally strong input to the medullary reticular nuclei from the cerebral coex, the red nuclei, and the basal ganglia.Lacking this input, the medullary reticular inhibitor system becomes nonfunctional, full overactivity of the pontine excitatory system occurs, and rigidity develops.Guyton 13th edition Pg: 714
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Physiology
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