152 



NERVOUS TISSUES 



leaving the capsule is more or less extensively convoluted over the cell 

 body forming in the extreme condition a so-called 'glomerulus.' These 

 same cells are variously modified by the presence of short, coarse and 

 fine intra- and extracapsular processes (both dendrons and collaterals) 

 frequently terminating in 'end disks' (Huber). Such processes may fuse 

 more or less extensively forming the 'fenestrated' variety of cells. The 



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FIG. 169. COMMON ATYPICAL, THOUGH PROBABLY PERFECTLY NORMAL, NERVE 

 CELLS FROM THE SPINAL GANGLION OF THE DOG. 



o and b, cells with collaterals ending in 'end bulbs'; c, a multipolar cell; d and e, 

 'fenestrated' cells. (Ranson, Jour. Comp. Neur., 22, 2, 1912.) 



axon, prior to its division, may split at one or several points, for longer 

 or shorter distances, into two or many portions, and reunite again into a 

 single fiber; rarely also the axon may have two or more points of 

 origin, probably the result of fusions of collaterals with the cell body. 

 These more complex atypical forms are said to predominate in man 

 (Ranson, Jour. Comp. Neur., 24, 6, 1914). Ranson regards them to 

 some extent at least as transient modifications, which may return to 

 the simpler unipolar condition. Nageotte (1907) has suggested that 



