DISEASES OF ABTEEIES 267 



as the animal is exposed to active exercise, one or both, hindlegs 

 begin to sway, get weaker and weaker, the leg or legs seem to 

 lose all power, the animal knuckles over and finally falls down 

 the heart beats violently, respiration is hurried and difficult. 

 The whole body is covered with sweat, the mucous membranes 

 are very red. After a little while all these symptoms lose 

 themselves and the animal gets up none the worse, to repeat 

 the performance when once more exposed to active exercise. 

 Eectal palpation reveals the thrombosed artery as a hard, 

 inelastic, dilated, longish object, with either no or decreased 

 pulsation below the thrombus. Palpation of the paralyzed 

 leg, as a rule, shows a wanting pulsation of the peripheral 

 ajterial branches and an icy coldness. 



What symptoms do dilatation and thrombosis of the internal 

 iliac arteries produce ? 

 The most marked ones are paralysis of the bladder, rec- 

 tum, coccygeal muscles. 



What symptoms do dilatation and thrombosis of the brachial 

 artery produce ? 

 The muscles of the affected foreleg tremble, the animal 

 stumbles, finally drags the leg, may even fall down. In these 

 cases, violent beating of the heart, dyspnoea, generalized 

 sweating, are, as a rule, absent. 



Give an example of a/newrismal varix. 



In rare instances, where jugular phlebotomy is unskil- 

 fully practiced, the carotid artery may be punctured and thus 

 adhesions between it and the jugular vein— an aneurismal 

 varix — arises. 



Outine the treatment of anev/risms. 



When possible, the artery ought to be ligated above and 



