THE NERVOUS SYSTEM 



429 



AnJecfroto-uH. current 



Area oj decreased excitability . 



Kaleleelrolbnic current" 

 '\ Area of increased excitability 



Af£W£ 



+ 

 Anode. 



\uu< 



B. 



fl/£/?y£ 



l^ t ~ j\ Vwfeak current" 

 descending 



rmasde: 



C 



Coi?/racfion occurs at" 'make 1 

 ouly , vij at kathode 



A/£/?V£ 



J" Very strong current 



fc Q descending y*^^^^^ 



— musd? ' 



Lonlrucfton occurs at" 'make 1 

 only 



D 



Very strong current" 

 asce&diua; 



A/£/?!/£ 



Contracfiou occurs at 'break. 1 

 uK a] anode. 



Fig. 126. — Diagram of Electrotonus. 



