HYSTERIA. 139 



is usually seen in mares and bitches, but has also been 

 noticed in animals of the opposite sex in certain rare 

 instances. A change of some kind taking place in con- 

 nection with the generative system is supposed to be the 

 cause of hysteria. 



Symptoms. — The animal becomes excited to a very great 

 degree. The pulse becomes rapid and very difficult to 

 take. One peculiar symptom is continual neighing, and in 

 some cases there is a sort of hiccough, caused by spasm. 

 After the animal has suffered awhile, the body becomes 

 covered by a profuse perspiration. There is in some cases 

 a whitish or reddish coloured discharge from the vulva. 

 Hysteria usually occurs about the time of the animal 

 coming into heat, but has been noticed in pregnant mares. 

 The above symptoms will often persist for one or two days 

 and disappear without anything having been done. Some- 

 times the appetite is impaired; the animal often urinates, etc. 



Treatment. — Give a purgative, opium, belladonna, potass 

 bromide, etc. Change food, feed lightly, keep quiet, etc. 



Cerebral Tumours. — These tumours are often met with 

 in what is known as the choroid plexus. They grow very 

 slowly, and are often of a fibrous character. In some 

 cases the)'' are cystic tumours, and often contain a substance 

 called brain-sand (a white shining substance of a scaly 

 nature), or such tumours may consist of a tuberculous 

 deposit. They rarely give any indication of their presence 

 until they have attained a certain size, when various 

 symptoms of their presence are manifested, as vertigo, 

 an irregular gait, convulsions, apoplectic seizures, general 

 inability to perform work, etc. Inflammation of the brain 

 may also result from the presence of such tumours. As 

 nothing can be done, it is useless to attempt any treatment. 



Tubercular Meningitis. — This disease occurs in animals 

 of a tuberculous diathesis; is sometimes met with in the 



