1 4 o 



ELEMENTS OF HISTOLOGY. [Chap. xvi. 



180. In the dorsal region of the cord there exists 

 near the grey commissure 

 a special cylindrical group 

 of large multipolar gan- 

 glion cells, which form the 

 column of Lockhart Clarke. 



In the posterior horns 

 the ganglion cells are few 

 and far between. Most of 

 them belong to the portion 

 of the posterior horn near 

 the posterior commissure. 



The substance of the 

 ganglion cells is fibril lated, 

 but there exists a granular 

 interstitial material, which 

 is especially well developed 

 near the nucleus. Some- 

 times smaller or larger 

 masses of yellowish pig- 

 ment granules are present 

 in this part of the cell 

 substance i.e., near the 

 nucleus. 



181. The fibrillated sub- 

 stance of the ganglion cells 

 is prolonged on to the pro- 

 cesses. There are always 

 one or two that are thicker 

 than the others. At a 

 longer or shorter distance 

 fromtne cel1 *he processes 

 branch dendritically into 



a loro-p rmrnVipr nf fihrps; 

 a Aaige numoer CS, 



-wliinh m T a-nf -nailer Impair nr 

 WlllCll e\ eilt'Ually break Up 



into the fine network of 

 primitive fibrillse, forming the nervous groundwork of 



Fif. 87.-An Isolated Multipolar 



S a theCord lloftlieGreyMatter 

 The dendritTcaiiy-branched processes 



break up into the fine nerve network 

 into which is seen to pass a fine nerve- 

 fibre derived from a posterior nerve 

 root. (Gerlacb, in Strieker's Manual.) 



