CONTENTS xiii 



CHAPTER X 



GENERAL PHYSIOLOGY OF THE NERVOUS SYSTEM. SPINAL AND CEREBELLAR 



REFLEXES 



PAGE 



Conduction within single neurons. Nature of the nerve impulse. Re- 

 flexes. Reflex arcs. Irreversible conduction. Graded synaptic resistance. 

 The orderly spreading of reflexes. Simple reflexes mediated by the spinal 

 cord. Significance of the head senses in the control of reflexes. The sen- 

 sory basis of locomotion. Structure and connections of the cerebellum. 

 Functions of the cerebellum. Postural reflexes 155 



CHAPTER XI 



STRUCTURE, NERVE CONNECTIONS, AND FUNCTIONS OF THE CEREBRUM 



The cerebrum in relation to muscular activity. A normal animal com- 

 pared with a "reflex" one. The cerebrum dependent on the receptor sys- 

 tem. Afferent paths of the cerebrum. Tracing nerve paths. Tracts of 

 Body sense. Tracts of the head senses. General structure of the cerebrum. 

 Structure of the cortex. Cortical localization. Cortical reflex paths. Cor- 

 tical reflexes compared with spinal. Memory. Association. Volition. 

 Inhibition. Will power. Habit formation. Language. Consciousness. 

 Emotions. Cerebral functions compared in man and animals. Nourish- 

 ment of the brain . . . 169 



CHAPTER XII 



THE AUTONOMIC NERVOUS SYSTEM. NERVOUS FATIGUE. HORMONES OF THE 



NERVOUS SYSTEM 



The brain stem (medulla and mid-brain). The autonomic or sympa- 

 thetic system. The effect of nicotine. Reflex control of the autonomic 

 system. Grand divisions of the autonomic system. This an emergency 

 mechanism. The relation of the autonomic system to emotional states. 

 Neuro-muscular fatigue. Adrenin. The thyroid. Emergency action of 

 the thyroid 192 



CHAPTER XIII 



THE RECEPTOR SYSTEM. INTERNAL AND CUTANEOUS SENSATIONS 



The receptor system. The differences between sensations. Psycho- 

 physical law. Classification of receptors. Internal senses. Muscular 

 sense. Hunger. Thirst. Cutaneous senses. Pain. Touch. Tempera- 

 ture sense. Peripheral reference of sensations. Perceptions. Illusions.. 204 



