92 



Veterinary Medicine. 



posed to any active exertion. Freidberger and Frohner say that 

 the habitual comatose condition alternates at intervals with 

 periods of violent excitement during which the animal pushes or 

 dashes against the wall, grinds the teeth, rears, paws, kicks, bites, 

 etc., and then relapses into the state of coma. When the disease 

 reaches this stage it may be questioned whether we are not deal- 

 ing rather with acute encephalitis. 



In active congestion the symptoms are always aggravated by 

 whatever tends to increase the vascular tension in the brain. 

 Active exertion, draught, the pendent position of the head, the 

 recumbent position on the side with the head as low as the bod}^ 

 or lower, aggravate all the phenomena and render the animal more 

 helpless. 



The following table slightly modified from Spitzka serves to 

 point out the distinctions between anaemia and hyperaemia : 



Symptoms. 



Pupils. 

 Respiration. 



Activity. 



Temperament. 

 Intelliirence. 

 Elevation of head. 

 Recumbent, d e 



pendent head. 

 Straining. 



In Cerebral Anaemia, 



In Cerebral Hj'persemia. 



Usually dilated and mobile. Usually small or medium. 

 Often interrupted by a de^ Normal or nearly so. 



breath or sijjh, even when 



at rest. 



'Lassitude. 



i 



Lethargic with exceptions. 

 Senses impaired. 

 Aggravates symptoms. 

 Amelioration. 



Restless, but indisposed 



to exertion. 

 Irritable with exceptions. 

 Impaired. 



No effect, or improvement. 

 Aggravation. 



Not necessarily aggravated. Aggravated. 



Cattle show the same general congestion and heat of the head> 

 ears and horns, congested mucosae, fixed eyes, and pupils, indis- 

 position to follow the herd, irritability, and dulness v.-ith often a 

 disposition to lie down. This may go on to violent bellowing, 

 pushing against the wall, grinding of the teeth, working of the 

 jaws, rolling of the eyeballs, and violent dashing in different 

 directions regardless of obstacles. 



Dogs show the same restlessness and excitability, congested 

 head, eyes and nose, frequent movement from place to place, a 

 desire to wander off, and it may be spasms. If there has been 

 any gastric disturbance vomiting usually supervenes. As in the 



