CEREBROSPINAL MENINGITIS. 209 



and one or both hemispheres become affected we then see the various 

 symptoms peculiar to this disease, and a diagnosis can be made 

 with almost absolute certainty. In diagnosing disease of the cere- 

 bellum there is generally an unsteadiness of the gait in walking. 

 There are peculiar movements, such as walking around in a circle 

 and rolling on the ground, when both hemispheres are involved. 

 We may have paralysis of the posterior extremities. In rare 

 instances, however, these symptoms may be presented in cases of 

 poisoning (by cocaine or apomorphia). 



The therapeutic treatment of this disease is not very defiuite. 

 In cases of simple unsteadiness of the gait the author has been 

 able to secure good results by means of laxatives and collodium of 

 cantharides applied to the neck. Where the animal turns in a 

 ring constantly, or rolls on the ground, such agents as morphia, 

 chloral, and bromide are often used. 



DISEASES OP THE SPINAL CORD AND ITS 

 MEMBRANES. 



Cerebro-spinal Mening'itis. 

 (^Meningitis Cerebro-spinalis. ) 



Etiology. Nothing is definitely known of the causes of this 

 disease. It is extremely rare in the dog. lienner and Kempen have 

 made several observations on the subject, and the author had one 

 case of his own. In this the disease seemed to be related, in some 

 way, with a wound on the anterior extremity. 



Pathological Anatomy. The anatomical foundation of the 

 disease seems to be an acute suppurating infiammation of the brain 

 and spinal membranes, for Renner, as well as the author, found 

 purulent exudation in the arachnoid, especially on the hemi- 

 spheres and the base of the brain, which was infiltrated by a quan- 

 tity of serous fluid. The same condition was also found in the 

 spine. 



Clinical Symptoms and Therapeutics. The symptoms 

 which were observed by Renner and the author were disturbances 

 of the sensitory nerves, in some cases the animal becoming uncon- 

 scious. There were loss of appetite, fever, and on the fifth day a 

 marked unsteadiness of the gait, beginning with a slow, dragging 



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