THE NERVOUS SYSTEM 269 



unilateral in the cases investigated. The liquefied necrotic tissue was 

 grayish red in color and usually represented an area about the size 

 of an English walnut. The affected swine were generally dull in 

 the beginning, but in one case observed the animal was excitable 

 and delirious. Swine affected with cerebral hyperemia usually evi- 

 dence an unsteady gait and may fall to the ground and show symp- 

 toms of convulsions. One case was observed that turned in a circle, 

 jumped up from the ground, and performed other antics. 



Treatment. — Treatment is of little value after the brain substance 

 has become necrotic. In the very early stages drastic purgatives 

 may be of value, particularly if the cause lay in the provender. 



PARASITES 



Rarely does the Cysticercus cellulosEe develop in the brain of swine. 

 The cyst does not develop as readily in the brain as in a muscle, and 

 it is the exception to find a matured cyst in the nervous tissue. The 

 symptoms produced will depend upon the location of the cyst in 

 the brain. 



