140 



A NEURAL METAMEKE. 



[BOOK i. 



PIG. 24. SCHEME OF THE NERVES OP A SEGMENT OF THE SPINAL CORD. 



Gr grey, W white matter of spinal cord. A anterior, P posterior root, (i ganglion 

 on the posterior root. N whole nerve, N' spinal nerve proper, ending in J/ skeletal 

 or somatic muscle, S somatic sensory cell or surface, A in other ways. V visceral 

 nerve (white ramus communicans) passing to a ganglion of the sympathetic chain 

 2. and passing on as V to supply the more distant ganglion o-, then as I'" to the 

 peripheral ganglion <r' and ending in m splanchnic muscle, s splanchnic sensory 

 cell or surface, r other possible splanchnic endings. 



From 2 is given off the revehent nerve r. v (grey ramus communicans), which 

 partly passes backward towards the spinal cord, and partly runs as v. m, in connection 



