106 



PHYSIOLOGY OF MUSCLES AND NER\ES. 



nerve-fibres, which are connected with the cell. The 

 kernel is finely granulated and is composed of a pro- 

 toplasmic mass, which, when 

 heated, or subjected to certain 

 other influences, becomes dull 

 and opaque, but which in a fresh 

 condition is usually somewhat 

 transparent. The form of the 

 paneflion-cells is very variable. 

 Sometimes they appear almost 

 globular ; in other cases they 

 are elliptic ; others, again, are 

 irregular, provided with numer- 

 ous offshoots. ]Most ganglion- 

 cells have one or more project- 

 ing processes ; some are, indeed, 

 found without processes, but it 

 is certain that this condition is 

 merely artificially produced, the 

 processes having been torn off 

 during the preparation of the 

 ganglion - cell. G anglion - cells 

 are occasionally inserted in the 

 course of the nerve-fibres, so 

 that the processes differ in no 

 way from other nerve-fibres, as 

 is shown in fig. 27. In the gan- 

 glion-cells of the dorsal marrow, 

 which have many processes, 

 some of these appear exactly 

 like the rest of the cell body — 

 that is to say, they are finely granulated ; these are 

 called protoplasmic processes. On the other hand, in 



Fio. 27. Gangmox-ceij-.s 



>V nil X EK V E-rUOCESSES. 



