x CONTENTS 



PAGK 



Nerve 73 



1. Structure and Development .73 



2. Chemistry of Nerve 76 



3. Physiology of Nerve 77 



SECTION IV 



I. THE NEURO-MUSCULAR MECHANISM 87 



1. Neural Arcs .......... 87 



2. Mode of Action of Neural Arcs .90 



3. Fatigue of Neuro- Muscular Mechanism 99 



4. The Chief Receptor Mechanisms 104 



a. Intero-ceptive Mechanism 105 



b. Proprio-ceptive Spinal Mechanism 107 



c. Extero-ceptive Mechanism ...... 108 



(a) Contact 1. Tactile Sense 108 



2. Thermal Sense 110 



3. Taste, Sense of 113 



(6) Distance 1. Smell, Sense of 115 



2. Sight, Sense of 116 



3. Hearing, Sense of 138 



d. Proprio-ceptive Mechanism of the Head .... 147 



5. The Connections between the Receiving and Reacting Mechanisms 149 



II. CENTRAL NERVOUS SYSTEM 



A. Spinal Cord . . . : 157 



B. Medulla 167 



C. Region of Pons Varolii 173 



D. Cerebellum 174 



E. Crura Cerebri and Corpora Quadrigemina .... 179 



F. Cerebrum 180 



PART II 



THE NUTRITION OF THE TISSUES 



SECTION V 



FLUIDS BATHING THE TISSUES 

 BLOOD AND LYMPH 202 



A. Blood . 202 



B. Lymph 222 



