xii CONTENTS 



CHAPTER VI 



THE STRUCTURE OF THE MOTOR ORGANS 



PAGE 



Motion in animals and plants. Amoeboid cells. Ciliated cells. The 

 muscles. Histology of striated muscle. Structure of unstriated 



/ muscular tissue. Cardiac muscular tissue. The chemistry of mus- 

 cular tissue. Beef-tea. Rigor mortis 73 



CHAPTER VII 



THE PROPERTIES OF MUSCULAR TISSUE 



Contractility. Irritability. A simple muscular contraction. Physiolog- 

 ical tetanus. Causes affecting degree of contraction. Measure of 

 muscular work. Muscular elasticity. Electrical phenomena of 

 muscle. Source of muscular energy. Physiology of smooth mus- 

 cular tissue 87 



CHAPTER VIII 



MOTION AND LOCOMOTION 



Special physiology of the muscles. Levers in the Body. Postures. 



Walking. Running. Hygiene of muscles. Exercise. Training . 102 



CHAPTER IX 



ANATOMY OF THE NERVOUS SYSTEM 



General statement. Nerve impulses. Neurons. Synapses. The myelin 

 sheath. The central nervous system. The spinal cord. The brain. 

 The spinal nerves. Cranial nerves. White and gray matter. The 

 sympathetic system 116 



CHAPTER X 



GENERAL PHYSIOLOGY OF THE NERVOUS SYSTEM 



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

 flexes. Irreversible conduction. Graded synaptic resistance. 

 Spreading of reflexes. Cerebrum the controlling organ . . . . 134 



CHAPTER XI 



Cerebrum dependent on the receptor system. Tracing nerve paths. 

 Paths of the various senses. Structure of the cerebrum. Cortical 

 localization. Sensory and motor areas. Cortical reflexes. Memory. 



