110 DISEASES OP CATTLE. 



TUMORS IN THE BRAIN, ETC. 



Tumors of different kinds have been found within the cranial cav- 

 ity, and in many cases there have been no well-marked symptoms 

 exhibited during the life of the animal to lead one to suspect their 

 existence. Oases are recorded where bony tumors have been found 

 in the brain of cattle that died suddenly, but during life no signs of 

 disease were manifested. Post-mortem examinations have discovered 

 tubercles in the membranes of the brain. (See "Tuberculosis," p. 

 398.) Abscesses, usually the result of inflammation of the brain, 

 have been found post-mortem. For the description of hydrocephalus, 

 or dropsy of the brain, of calves, the reader is referred to the section 

 on parturition. (See "Water in the head," p. 176.) 



Chorea, constant twitching and irregular spasmodic movements of 

 the muscles, has been noticed in connection with, or as a sequel to, 

 other affections, as, for example, parturient apoplexy. 



Various diseases, the description of which will be found in other 

 sections of this work, affect the nervous system to a greater or less 

 extent — for* example, ergotism, lead poisoning, uremia, parturient 

 apoplexy, colic, and other affections associated with cramps, or spasms, 

 etc. Disease of the ovaries or of the spinal cord, by reflex irritation, 

 may cause estromania (see "Excess of venereal desire," p. 145), con- 

 stant desire for the bulL 



