92 



Veterinary Medimie. 



posed to any active exertion. Friedberger and Frbhner 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 body 

 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 hypersemia : 



Symptoms. 



Pupils. 

 Respiration. 



Activity. 



Temperament. 

 Intelligence. 

 Elevation of head 

 Recumbent, de- 

 pendent head. 

 Straining. 



In Cerebral Anaemia. 



Usually dilated and mobile. 

 Often interrupted by a deep 



breath or sigh, even when 



at rest. 

 Lassitude. 



Lethargic with exceptions. 

 Senses impaired. 

 Aggravates symptoms. 

 Amelioration. 



Not necessarily aggravated. 



In Cerebral Hypersemia. 



Usually small or medium. 

 Normal or nearly so. 



Restless, but indisposed to 



exertion. 

 Irritable with exceptions. 

 Impaired. 



No effect, or improvement. 

 Aggravation. 



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 dullness with 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 



