320 



PRACTICAL PHYSIOLOGY 



katelectrotonus. 



The minimal stimuli now become maximal, owing 



to the increase in the excitability of the nerve at the kathode 



The above experiments can be repeated with a crystal of common 

 salt placed in the position of the stimulating electrodes. The salt 

 causes chemical excitation, and the muscle shows incomplete tetanus, 

 which is quelled by anelectrotonus, and augmented by katelectrotonus 

 (Figs. 200, 201). 



