Decerebral rigidity

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Decerebrate rigidity arises from a bilateral lesion at the level of the mesencephalon' or caudal diencephala. It is the result of removing the influence of the inhibitory part of the descending reticular formation. This will increase the tone of the extensors. Rather than rigidity, it is extension spasticity. The upper limbs are extended, the forearm is in pronation, the wrist is in flexion. The lower limbs are extended. opistotonus can occur.

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