CONTENTS xvii 



CHAPTER XV. 

 ELECTRO-PHYSIOLOGY. 



PAGE 



Currents of rest and action 



Relation between action current and functional activity - -827 



Polarization of muscle and nerve - - - -829 



Electrotonic currents _-..-- 830 

 Heart-currents - "*."" ^$3 



Human electro-cardiogram ... - - 835 



Glandular currents - - * 838 



Eye-currents - .... - 839 



Electric fishes - - 840 



CHAPTER XVI. 

 THE CENTRAL NERVOUS SYSTEM. 



SECTION I. STRUCTURE HISTOLOGICAL ELEMENTS - - 847 



Development - - - $49 



Histological elements - - 850 



Nutrition of the neuron - 858 



SECTION II. GENERAL ARRANGEMENT OF THE GREY AND WHITE 



MATTER IN THE CENTRAL NERVOUS SYSTEM - 861 



SECTION III. ARRANGEMENT OF GREY AND WHITE MATTER IN 



SPINAL CORD - 863 



Tracts of the cord - - 866 



SECTION IV. ARRANGEMENT OF GREY AND WHITE MATTER IN 



THE UPPER PORTION OF THE CEREBRO-SPINAL Axis - 869 



SECTION V. CONNECTIONS OF THE LONG PATHS OF THE CORD - 870 

 SECTION VI. PATHS FROM AND TO THE CORTEX - - 878 



SECTION VII. CONNECTIONS OF BRAIN STEM WITH CORD 



CONNECTIONS OF CEREBELLUM - 884 



SECTION VIII. FUNCTIONS OF THE CENTRAL NERVOUS SYSTEM 



THE SPINAL CORD ..... 887 



Decussation of the sensory paths .... 894 



Reflex action - ..... 897 



Principle of the common path .... 899 



Role of the receptor in reflex action - - 900 



Characteristic properties of the reflex arc - - 902 



Irradiation of reflex action - - 905 



Co-ordination of reflexes - - 908 



Influence of the brain on spinal reflexes ... 910 



Automatism of the spinal cord - - - 916 



Muscular tonus postural reflexes - - - - 917 



