Occurrence of Extensor Rigidity in Quadrupeds as a Result of Cortical Injury

Abstract

PERMANENT contraction of certain muscle groups occurs in apes, following the removal of the cortical motor centres of the limbs. Hermann Munk (1895) stated that ‘contractures’ do not occur in rabbits, cats, and dogs following similar operations. Recent workers are of the opinion that extirpation of the gyrus proreus of the cat results in an exaggerated extensor tonus in the contralateral limbs, but removal of the motor cortex fails to influence the tonus of the corresponding limbs.

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LAUGHTON, N. Occurrence of Extensor Rigidity in Quadrupeds as a Result of Cortical Injury. Nature 120, 297 (1927) doi:10.1038/120297a0

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