xxiv COMPARATIVE ELECTRO-PHYSIOLOGY 



CHAPTER XXXIV 



EFFECT OF TEMPERATURE AND AFTER-EFFECTS OF STIMULUS 

 ON CONDUCTIVITY 



PAGE 



Effect of temperature in inducing variations of conductivity : (a) by Method 

 of Mechanical Response ; (t>) by Method of Electric Balance Effect of 

 cold Effect of rising temperature The Thermal Cell After-effect of 

 stimulation on conductivity The Avalanche Theory Determination of 

 after-effect of stimulus on conductivity by the Electrical Balance After- 

 effects of moderate stimulation After-effect of excessive stimulation . 497 



CHAPTER XXXV 



MECHANICAL RESPONSE OF NERVE 



Current assumption of non-motility of nerve Shortcomings of galvano- 

 metric modes of detecting excitation Mechanical response to continuous 

 electric shocks Optical Kunchangraph Effect of ammonia on the 

 mechanical response of nerve Effect of morphia Action of alcohol 

 Of chloroform Abnormal positive or expansive response converted into 

 normal contractile through diphasic, after tetanisation Similar effects 

 in mechanical response of vegetal nerve Mechanical response due to 

 transmitted effects of stimulation Determination of velocity of trans- 

 mission Indeterminateness of velocity in isolated nerve Kunchan- 

 graphic records on smoked glass Oscillating recorder Mechanical 

 response of afferent nerve Record of mechanical response of nerve due 

 to transmitted stimulation, in gecko Fatigue of conductivity Conver- 

 sion of normal contractile response into abnormal expansive, through 

 diphasic, due to fatigue ......... 507 



CHAPTER XXXVI 



MULTIPLE RESPONSE OF NERVE 



Great sensitiveness of the high magnification Kunchangraph Individual 

 contractile twitches shown in tetanisation of nerve Sudden enhance- 

 ment of mechanical response of nerve on cessation of tetanisation 

 Secondary excitation Multiple mechanical excitation of nerve by single 

 strong stimulation Multiple mechanical excitation of nerve by drying . 532 



CHAPTER XXXVII 



RESPONSE BY VARIATION OF ELECTRICAL RESISTIVITY 



Variation of resistance in Dionica, by ' modification ' Excitatory change, 

 its various independent expressions Characteristic difficulties of investi- 



