CH. XLVI.] 



PROJECTION SYSTEMS. 



6 5 I 



sations round cells of the anterior horn of the spinal cord (see also fig. 453) ; 

 the main fibre has a similar termination.* The motor nerve-fibre passes from 

 the anterior cornual cell to muscular fibres where it ends in the terminal 

 arborisations called end-plates. 



Coming now to the sensory fibres, a cell of one of the spinal ganglia is 



A.C.N 



Fig. 484. Scheme of relationship of eel In and flbrew of brain and cord. (In the preparation 

 of this diagram I have received considerable assistance from Dr. Mott.) 



shown. Its axis-cylinder process bifurcates, and one branch passes to the 

 periphery ending in arborisations in skin and tendon. The other (central) 

 branch bifurcates on entering the cord, and its divisions pass upwards and 

 downwards, the latter for a short distance only ; the terminations of this 

 descending branch and of collaterals of the ascending branch round the cells 



The intermediate ei-11 station in i he posterior horn between the pyramidal 

 nine and the anterior cornual cell (Schafer) is not shown in the diagram 

 (see also p. 610). 



