200 STUDIES IN ELECTRO-PHYSIOLOGY: 



say, a pressure of 100,000 volts. The quantity of energy 

 expended has not been varied, o:ily its distribution altered. 

 (Le Bon.) 



In this light we may ponder several forms of spinal 

 ganglion cells, showing the cell bodies, the afferent sensory 

 nerves, and the dorsal roots. 



Fig. 108. 



(After Landois and Stirling.) 



To my mind a, c are nerves carrying storage cells, 

 which would hold their charge unless and until excessive 

 mental or physical exertion had disturbed neuro- electrical 

 equilibrium in the sense of bringing about a subnormal 

 local or general body potential, while b and e are simple 

 closed circuits, and d a nerve carrying a condenser. Per- 

 haps this view may throw some further light upon the 

 subject and help us to a better appreciation of the functions 

 of ganglion cells. It must be remembered, however, that 

 the due functionment of both ganglion storage and 

 ganglion-condenser cells is absolutely dependent upon the 

 maintenance of their normal insulation resistance. Should 

 the absolute insulation of the storage cell be broken down 



