CHAPTER XI. 



DISEASES OF THE BRAIN AND NERVOUS SYSTEM. 



1, PHRENITIS OR INFLAMMATION OF THE BRAIN. II. CEREBRO-SPINAL MENINGITIS. 



III. APOPLEXY. IV. MEGRIMS. V. TETANUS OR LOCKJAW. VI. 



PARALYSIS. VII. SUNSTROKE. 



I. Phrenitis or Inflammation of the Brain. 



All the highly developed nervous systems — those of man, the dog and 

 the horse — are more subject to disease than the quieter, and less devel- 

 oped nervous organizations of the ox, sheep, pig, etc. 



Inflammation of the brain, sunstroke, tetanus and paralysis are quite 

 common in the first mentioned animals and very rarely met with in the last. 



INFLAMMATION OF THE BRAIN. 



Sample of the antics of a horse during the delirium of brain fever. 



Causes. — The causes of phrenitis are various, such as concussion of 

 the brain ; exposure to cold, wet storms; extension of fever from the 

 body ; and sometimes the cause is not apparent. 



How to know It. — There is a quick pulse ; great prostration ; respira- 

 tions are quick, bowels coostipated ; visible mucous membranes are very 



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