650 



Chronic Dropsy of the Ventricles. 



contains flocculi of fibrin, the latter being tlie result of meningo- 

 encephalitis. 



Symptoms. xVll the symptoms of the disease are referable 

 to the pressure which affects all portions of the brain anterior 

 to the tentroium cerebelli, the hemispheres and the large basal 

 ganglia. Consequently general cerebral symptoms are ob- 

 served to be most prominent, but there are also disturbances of 

 the body functions. 



The disturbances of 

 consciousness cause, 

 aljove all, a change in 

 the demeanor of the ani- 

 mals (Fig. 90). The ani- 

 mal appears to be more 

 or less indifferent to its 

 surroundings and stands 

 in a sleepy condition 

 with head sunk, half- 

 closed eyes and a vacant 

 expression. The head is 

 frequently rested upon 

 some object, there is 

 either little or no move- 

 ment of the ears and the 

 animal does not always 

 turn them towards a 

 sound, but frequently in 

 the opposite direction 

 (socalled reversed ear 

 movements). Faint 

 sounds usually call forth 

 no reaction on the part 

 of the animal, but louder 

 noises, such as the bang- 

 ing of a door or clap- 

 ]ung the hands, make 

 the animal collect itself, 

 l)ut it soon relapses into 

 t!i(^ sleepy state (nar- 

 colepsy). 



Appetite is vari- 

 able; the animal may 

 take hay or straw into 

 its mouth, but allows it to hang out between the lips. Both eat- 

 ing and drinking appear to be abnormal ; the animal buries its 

 widely opened mouth quickly into the food, gets too large a 

 quantity into the mouth and chews it slowly. While drinking 

 the head is lowered down until the nostrils are covered by the 

 water and it is soon withdrawn suddenly owing to difficulty of 

 respiration. In many cases the horses make movements as if 



90. Horse "svith internal hydrocephalus. 

 ("Dummy.") 



