PRINCIPLES OF VETERINARY SURGERY 



467 



and uneasy. The muscles are hard and projecting. He seems 

 mummified. The contractions give a very special physi- 

 ognomy to each region. 



In the head, the alae nasi are turned up, the nostrils di- 

 lated, the lips hard, rigid and tense, the eyes fixed, glitter- 

 ing and retracted to the depth of their sockets, so as to 

 force the membrana nictitans over the eyeball and the ears 



Fig. 45. 

 Incipient Subacute Tetanus. 



upright and drawn together. The masseters compress the 

 dental arcades : this is lockjaw. The jaws cannot be sepa- 

 rated, and mastication, at first difficult, becomes impossible. 

 The contractions of the muscles of the pharynx render 

 deglutition difficult or impossible, and those of the thorax 

 and abdominal wall render respiration dif^cult and compress 

 the stomach. 



