CHAPTER VII. 



THE NERVOUS SYSTEM. 



Its Diseases and How to Cure Them. 



Divisions of the nervous system, functions of the various 



PARTS, inflammation OF THE BRAIN OR ENCEPHALITIS, MAD STAG- 

 GERS OF THE OLD WRITERS OR MENINGITIS, SUNSTROKE OR HEAT 

 EXHAUSTION, SPASM OF THE THIGH, INFLAMMATION OF THE MEM- 

 BRANES SURROUNDING THE SPINAL CORD, LOCK-JAW, HYDROPHOBIA, 

 ELECTRIC SHOCK, ETC. 



ITUATED within the body having the brain as a center is a won- 

 derfully complex system of nerves, which is almost entirely 

 controlled by the will of the animal. Besides this there is 

 ((5) another set, independent of this system, which regulates the beat- 

 ing of the heart, and all other movements over which the will has but 

 little or no control. The latter consists of numerous small centers, call- 

 ed ganglia, extending in two great chains from the head to the tail, on 

 each side of the back-bone, and closely connected with the other system 

 by a peculiar communication. They are usually considered and defined 

 as follows: 



Divisions of the Nervous System. There are two divisions of 

 the nervous system, the cerebro-spinal or that presiding over animal 

 life, and the sympathetic, that regulating organic life. 



