266 



PHYSIOLOGY OF MUSCLES AND NERVES. 



pheric nerve-fibres, it is natural to refer these to the 

 presence of the ganglion-cells. 



As a matter of fact, all organs which contain nerve- 

 cells, the central organs as well as the peripheric 



Fig. 68, Gaxgliox-cells from the ihiman brain. 

 1. A paiiglioncell, of which one process, a, becomes the axis-cylimler of a nerve- 

 fibre, b. 2. Two cells, n and b, interconnected. 3. Diagi-uniniatic rei)resenta- 

 tibn of three connected cells, each of which passes into a nerve-fibre, c. 4. 

 Ganglion-cell partly filled with black i)ignient. 



organs, in which they are present, though not so abun- 

 dantly, exhibit certain peculiarities, which we must re- 

 gard as caused by the nerve-ceils. And as we are in no 

 case able to examine the nerve-cell by itself, but must 

 always examine it in connection with, and mingled with 

 the nerve-fibres, w^e can but carefully determine the dif- 



