DISEASES OF THE NEJtVOVS SYSTEM. 169 



been manifested by previous symptoms, and their cure is demanded. 



The treatment of general predisposition should be tonic and applied to 

 the nervous system. The oxide of zinc in two grain doses twice dally is a 

 reliable agent, and should be persisted in to secure a full effect. Over- 

 feeding, plethora, want of exercise, worms, etc., suggest a change in 

 management and the needed medication. 



VMSiTIGO. 



Vertigo or dizziness is an occasional symptom among dogs. If severe 

 they fall suddenly, remain motionless for a few moments, and are again 

 moving about as before. In mild cases they simply reel for a few st«ps 

 like one intoxicated. At times vomiting occurs. Generally the cause can 

 be attributed to Indigestion or liver derangements. Sometimes over-eat- 

 ing, and occasionally deprivation, are active influences. A tight collar 

 may interrupt the circulation in the head and therefore Induce an attack. 



Treaimenl. — The most Important measure is to obviate the cause. 

 After that is removed tonic remedies, nutritious diet and other means of 

 improving the general health are indicated. 



ilS'OPZExy. 



The term apoplexy signifies a sudden stroke or shock. It does not rep- 

 resent an individual disease, but is applied to sudden lethargy or profound 

 stupor, occurring in different affections of the brain. 



Causation . — The most frequent condition which gives rise to apoplexy 

 is hemorrhage within the skull, the blood pressing, upon the brain sub- 

 stance thereby inducing paralysis. Sometimes''an apoplectic attack is 

 induced by sudden congestion of the brain, as in cases of sunstroke. 

 Another condition which may give rise to it, is an interruption in the cii'- 

 culation of blood in a portion of the brain by the plugging of an important 

 artery. This accident Is caused by clots, which may have formed either 

 in the heart or arteries. Profound stupor may occur in inflammation of 

 the substance of the brain, and as the result of ursemlc poisoning in dis- 

 eases of the kidneys. 



Certain morbid conditions within the skull may exist, and other influen- 

 ces which invite an unusual accumulation of blood there, may co-operate 

 to cause an apoplectic seizure. Great mental excitement, anger, intense 

 heat, violent exercise, blows on the head, and straining are among the 

 exciting causes. A short neck and full habit, as seen in certain breeds. 



