CONTENTS xvii 



CHAPTER XV. 

 ELECTRO-PHYSIOLOGY. 



PAGE 



Currents of rest and action - - 796 



Relation between action current and functional activity - - 797 



Polarization of muscle and nerve - - 802 



Elcctrotonic currents - 803 



Heart-currents - - 806 



Human electro-cardiogram - ... 808 



Glandular currents - - 810 



Eye-currents - - - - - 811 



Electric fishes - - - - 812 



CHAPTER XVI. 

 THE CENTRAL NERVOUS SYSTEM. 



SECTION I. STRUCTURE HISTOLOGICAL ELEMENTS - - 819 



Development - - 821 



Histological elements ..... 822 



Nutrition of the neuron - - 830 



SECTION II. GENERAL ARRANGEMENT OF THE GREY AND WHITE 



MATTER IN THE CENTRAL NERVOUS SYSTEM - 833 



SECTION III. ARRANGEMENT OF GREY AND WHITE MATTER IN 



SPINAL CORD - 835 



Tracts of the cord - - 838 



SECTION IV. ARRANGEMENT OF GREY AND WHITE MATTER IN 



THE UPPER PORTION OF THE CEREBRO-SPINAL Axis - 841 



SECTION V. CONNECTIONS OF THE LONG PATHS OF THE CORD 842 



SECTION VI. PATHS FROM AND TO THE CORTEX - 850 



SECTION VII. CONNECTIONS OF BRAIN STEM WITH CORD 



CONNECTIONS OF CEREBELLUM - - 856 



SECTION VIII. FUNCTIONS OF THE CENTRAL NERVOUS SYSTEM 



THE SPINAL CORD - 859 



Decussation of the sensory paths - - 866 



Reflex action - ... 869 



Principle of the common path - - 871 



Role of the receptor in reflex action - ... 872 



Characteristic properties of the reflex arc - - 874 



Irradiation of reflex action - ... 877 



Co-ordination of reflexes , . . 880 



Influence of the brain on spinal reflexes . - - 882 



Automatism of the spinal cord .... 888 



