112 THE NEEVOUS TISSUES 



rations the dendrites frequently present a thorny appearance, due 

 to the clustering along their borders of minute lateral projections, 

 the gemmules. 



The terminal filaments of the dendritic arborization are fre- 

 quently in relation with the cell bodies or neu raxes of other neu- 

 rones, less frequently with the dendrites of other neurones. 



The neuraxis (neuraxon, dendron, neurite, axone, axis cylinder 

 process). This process, in contradistinction to the dendrite, 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 con- 

 tains no stainable substance of Nissl. It arises from the cell body, 

 or less frequently from the base of a dendrite, by a conical, clear 

 area, the axone hillock, which, like the process itself, is devoid of 

 Nissl's stainable granules. 



At some little distance from the parent cell body the neuraxis 

 gives off very fine lateral branches, the collaterals, which leave the 



FIG. 110. GOLGI CELL, TYPE i, FROM THE SPINAL CORD OF A HUMAN FETUS. 



At * is the relatively straight neuraxis which has already given off one collateral. Golgi's 



stain. (After von Lenhossek.) 



parent stem at nearly right angles. These delicate branches finally 

 terminate by a sudden end arborization, or end brush, by which each 

 neuraxis is placed in relation with a large number of neurones. 



