GENERAL HISTOLOG Y. 



95 



often pass over into iieriplieral nerves. Thev branch at 

 so the morphological distinc- 

 tion from dendrites lies in the 

 greater distance of the region 

 of branching from the body 

 of the ganglion cell. In bi- 

 polar ganglion cells both pro- 

 cesses are nenrites, the cell 

 itself thns being an element 

 intercalated in the course of 

 a nerve-fibre, as also is a uni- 

 polar ganglion cell. The single 

 jirocess of this divides near 

 the cell in a T-shaped man- 

 ner, so that the unipolar cell 

 is to be regarded as a bipolar 

 ganglion cell in which the two 

 neurites are united for a short 

 distance. 



This conception is intel- 

 ligible in the light of recent 

 researches on the structure of 

 the ganglion cell and its pro- 

 cesses (fig. 52). Both consist 



tips, 



Fig. 51.— Multipolar ganiclion ( 

 (After Gegenbaur.) a, : 



Fio 53 —Motor ganglion cell from the thoracic region of the spinal cord of a dog. 

 Letter Kethe.) H, nucleus. 



of extremely fine fibrillaj, and inter- and perifibrillar substances 

 cementino- them together. Each process brings a bundle of 



