Diseases of the Nervous System. 351 



fiftli neck-bone (broken neck, pithing,) it is promptly 

 fatal by abolishing respiration. 



PAEAPLEGIA. PALSY OF THE HIND LIMBS. 



This is a common form of paralysis resulting from 

 broken back or loias, or it may be reflex from disordered 

 digestion, etc. (in horses, cattle, dogs). It may also occur 

 from tumors or parasites ia the spinal cord, from bony 

 swellings the result of sprains, from inflammation and 

 softening of the cord, and from lolium temulentum (dar- 

 nel), and the newly ripened seeds of its allies, lolium 

 linicola (flax rye-grass), and lolium perenne (perennial lye- 

 grass). The chick vetch, millet, ergot and various blood 

 poisons (taurocholic acid, leucin, tyrosin, iirea, etc.,) have 

 a similar action. 



HEMIPLEGIA. 



This consists in paralysis of one lateral half of the 

 body, to the exclusion of the other, usually as the result 

 of some disorder of one side of the brain or spinal cord. 

 It occurs in all animals but less frequently than paraplegia. 



FACIAL PAEALVSIS. 



This sometimes occurs from a continuous current of 

 cold air striking on the side of the face, but also from 

 bruises behiad the eye and joint of the jaws, by a badly 

 fitting bridle, a collar, or apparatus commonly used for 

 breachy horses. Cows suffer from similar injuries from 

 stanchions. Finally it may result from disease of the 

 brain or middle ear. 



Other local paralyses, such as of the ear, eyelids, lips, 

 tongue, larynx, tail, etc., result from corresponding causes. 



Treatment for paralysis. Our first object must be to 

 remove the cause, whether this consist in digestive, urinary 

 or uterine disorder, in congestion, inflammation, or press- 

 ure on the brain or nerves. When a nerve is cut across, 

 we nmst wait for its reunion. When the cause is irre- 



