Etiology. 



831 



also 111 certain diseases of the brain, for example, after con- 

 tusion of the brain (noted by Barbey in a dog). As a distinct 

 disease it occurs very seldom. Hyperidrosis was noticed by 

 Pott m horses after feeding on pumpkins. 



Local or partial hyperidrosis also occurs chiefly as a sec- 

 ondary affection and is usually caused by traumatic lesions or 

 by compression of the peripheral nerves or the s^^ipatheticus, 

 and more rarely hj traumatic or inflammatory diseases of the 

 spinal cord. 



The known eases of partial hyperidrosis which have been reported so far 

 occurred as the result of traumatism at the neck (Dupas), front of the chest or 



Fig. 118. Hyperidrosis localis in a horse. The dark stripe correspoiuls to the sweating 

 intercostal region ; at the upper end of the stripe there is a fracture of the rib. 



shoulder region (Eiehter), also after fracture of the ilium (Delacroix), of the rib 

 (personal observation), and after a trauma the nature of which is not stated 

 (Dexler). Forgeot noted sweating appearing regularly after subcutaneous injec- 

 tions of ether, and limited to the point of injection; it lasted several days to three 

 months. Local sweating occurs pretty frequently in inflammatory diseases of the 

 pharygeal region (Schindelka, Dexler, Dupas), while in one of Schindelka's cases, 

 m a horse with pleuro-pneumonia, almost the whole of the anterior half of the body 

 was affected. Compression of the peripheral nerves or of the sympathetieus through 

 tumors or swellings now and again causes sweating (Kerlirzin, Dexler), while in 

 pertain cases of fractured vertebra3 (Eoder, Emshoff) the onset of girdle-like hyper- 

 idrosis commencing at the fracture has been noticed. Bielefeld saw a circumscribed 

 sweating in the region of the forehead of a horse suffering from neuralgia of the 

 trigeminus. Finally a case of unilateral hyperidrosis was noticed by ~ ^ 



mally 

 horse with disseminated encephalo-niyelitis. ' 



noticed by Dexler in a 



