THE NERVE CELL 



129 



This process in contradistinction to the dendron, is long and slender, as 

 a rule does not arborize near its parent cell-body, is of smooth and regular 

 contour in Golgi preparations, and contains no chromophilic substance. 

 It arises from the cell body, or less frequently from the base of a dendron, 

 by a conical, clear area, the a.ron hillock or implantation cone, which, 

 like the process itself, is devoid of chromophilic granules. It consists of 



n 



FIG. 143. GOLGI CELL, TYPE I. 

 c, collaterals; n, axon. Golgi's stain. (After Kolliker.) 



a bundle of delicate neurofibrils (axon fibrils) embedded in axopJasm. 

 During early developmental stages the fibrils increase in number by a 

 splitting of preexisting fibrils. 



At some little distance from the parent cell-body the axon gives off 

 very fine lateral branches, the collaterals, which leave the parent stem 

 at the nodes of Ranvier at nearly right angles. These delicate branches, 

 as also the axon proper, finally terminate by a sudden end arborization, 

 or telodendrion, by which each axon is placed, in relation with a large 



