28 DAVID P. C. LLOYD 



different. In the decerebrate animal, the stretch reflex prevails with the 

 antagonist system held in check at the internuncial level of its disynaptic 

 pathway. As the stretch reflex gains in force by increased stretch the recurrent 

 action necessarily increases pari passu with it (as parenthetically does the 

 inverse myotatic reflex input). At some point reversal in the reflex taxis of 

 the limb takes place. It seems entirely likely that the recurrent action of the 

 motoneurons is involved and that the motoneurons in effect control the 

 extent to which they can be driven by monosynaptic reflex afferent impinge- 

 ment. 



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