1906.] 



On Innervation of Antagonistic Muscles. 



485 



'Signal B 



Signal A 



Fig. 4. — Scratch-reflex of spinal dog. The reflex was evoked from the skin of the shoulder 

 by unipolar faradisation applied for a period marked by the signal line A. The reflex 

 soon after its commencement was inhibited by stimulating (unipolar faradisation) the 

 skin of the planta of the foot engaged in the scratching-reflex. The time of the 

 inhibitory stimulus is registered by signal line B. After cessation of the inhibitory 

 stimulus the scratch-reflex— its stimulus being continued throughout — returned, and 

 on return was more ample than before the inhibition. Time registered above in 

 fifths of second. 



