1908. | Innervation of Antagonistic Muscles, 557 
(2) Among the afferent nerve-fibres proceeding from vasto-crureus are some 
which can evoke and maintain reflex tonic contraction of the muscle itself. 
That seems proved by the dependence of the decerebrate rigidity of this 
Ae 
Fig. 33. 
muscle upon the afferent fibres of the vasto-crureus nerye.* (3) When the 
“shortening reaction” is elicited in the decerebrate animal it is in some 
* Sherrington, ‘Journ. of Physiology,’ vol. 22. 
