CONTENTS. 



CHAPTER I. 



PAGE 



The Study of the Nervous System i 



Point of view; anatomical, experimental and physiological 



methods. 

 Morphological terms; planes of sectioning; neurological terms. 



CHAPTER II. 



General Morphology of the Nervous System 12 



CHAPTER III. 



Development of the Nervous System 34 



Neural tube; neural crest; neuromeres; secondary brain seg- 

 ments; auditory and olfactory pits and optic vesicle; histo- 

 genesis of central nervous system; longitudinal zones. 

 Development of peripheral nerves and sense organs; part 



played by the neural crest and by ectodermal placodes. 

 Morphology of the head. 



CHAPTER IV. 



Nerve Elements and their Functions 76 



Functions of nerve elements; stimuli and impulses; polar dif- 

 ferentiation; parts of a nerve cell and course of impulses. 

 Receptive and excitatory cells and reflex actions. 

 The Neurone Theory. 



CHAPTER V. 



The Functional Divisions of the Nervous System .... 95 

 The work of the nervous system in relation to soma and 

 viscera; four kinds of nervous activity and the correspond- 

 ing divisions of the nervous system. 

 vii 



