718 



FUNCTIONS OF THE SPINAL CORD 



[CH. XLIX. 



employ is a weak faradic current, and ifc is the nerves at the roots 

 of the hair follicles which are specially susceptible when eliciting 



FIG. 443. The Scratch reflex. Tracing of the flexors of left hip evoked by stimulation of the skin 

 of the shoulder. The depression in the signal line S indicates the commencement of the stimulation, 

 and its rise the termination. While this was going on, the left foot was stimulated, and the 

 depression of the signal line L indicates the duration of this stimulation ; during the stimulation 

 of the foot, and for a short time afterwards, the scratch reflex is inhibited, but the scratch reflex 

 returns soon afterwards. The time is registered in fifths of seconds. To be read from left to 

 right. (Sherrington.) 



the reflex. The internuncial paths in the cord are in the lateral 

 part of the lateral column, and division of that region of the cord 

 abolishes the reflex. 



