THE SPINAL CORD 



675 



fl 6 



FIG. 400. SHOWING REFLEX ACTION AFTER REMOVAL OF BRAIN. 

 In weak acid is applied ; & shows reflex efforts at removal of the stimulus. 



B 



A, The receptive tield for the scratch reflex as revealed after low cervical transaction. 



Ir marks position of last rib. 



B, Diagram of spinal arcs involved. L, receptive or afferent nerve-path from left 



foot; R, receptive nerve -path from opposite foot; Ka, Pj3, receptive nerve-paths 

 from dorsal skin of left side; FC, the final common path, in this case to a flexor 

 muscle of th-? hip; Pa, Pp, proprio-spinal neurons. (From Sherrington's " In- 

 ti-grativo Action of the Nervous System," by permission of Yale University 

 Press and Messrs. Constable and Co., "Ltd.) 



