Fig. 6.— The "scratching" reflex of the hind-foot of the dog, elicited by electrically 

 stimulating a skin-point at the shoulder. 



During the course of this rhythmic reflex an electric stimulus was applied to the skin of the opposite 

 hind-foot ; this stimulus causes stepping movements in the foot which was previously executing 

 the scratching reflex. The record shows the inhibition of the reflex scratching to make way for 

 the new reflex, of much slower rhythm, of stepping. Time above in fifths of seconds 



