ELECTROMOTIVE ACTION IN NERVE 



347 



between motor end-plates and corresponding muscle-fibres, and 

 we must therefore cite it in detail. Du Bois - Reymond gives 

 the whole argument in his well-known treatise, Experimented 

 Critique of the Theory of Discharge (57). If each end-plate is 



FIG. 227. 



conceived as developing opposite potentials when excited at the 

 dorsal- and under-surfaces, like an electrical plate, then the two 

 surfaces of the plate being presumably isoelectric the resulting 

 lines of current will be according to du Bois-Reymoud's schema 

 (Fig. 227, a, b). 



