90 THE PHYSIOLOGY OF MUSCLE AND NERVE. 



is physically an anode or cathode, there will be, as regards the 

 nerve, a series of what may be called physiological cathodes and 

 anodes. The closing shock arises at these cathodes, the opening 

 shock at the anodes. The position of the series of anodes and 

 cathodes will vary according as the active electrode is an anode 

 or cathode, as is indicated in the accompanying diagram (Fig. 35). 



