uu 



PHYSIOLOGY OF MIX 1.1 > AM) M-iK\ I >. 



lie posnlile that these t\\o conditions differ 111 the IV- 



lilt inn uhich they bear to the excitt ment. Indeed, 

 1'lliiger suppo.-ed that excitement occurs only at the 

 commencement of katelectrotonus and at the cessation 

 of anelectrotonus. ( )n the basis of this hypothesis the 

 phenomena of the law of pulsations may be explained; 

 and it becomes intelligible why on the eliding and 

 npeiiing of the current pulsations sometimes occur and 

 MX- sometimes absent. In order, however, fully to 



FlO. ">'>. F.I.I'-' TI:i>Tii\TS. 



understand this hypothe-is and the law of j)iilsations 

 lia-ed upon it, we lilll> study the phenomena of elri- 

 trotonus more closely than we have yet <loue. 



.">. We have already seen that the excitabilit v is in- 

 creased mi the side of the kathode during the closing 

 of the current, ami is decreased en the side of the 

 anode. Kasy as it i> to prove this law under the appli- 

 cation of \\eak, or medium currents, it is sometime.-* 

 very hard to do ,-o \\ hen t he current causing the eh-c- 

 trotoiuis is strong. Lei us a-ain iiiiiigine thai I he 



