200 



CLINICAL DIAGNOSTICS. 



interest in their surrounding?, do not rccog^nize familiar per- 

 sons, run against obptacles, etc. In feeding- they grab the food 

 with the incisor teeth, chew slowly and "languidly," stop 

 without a motive when food is still in the mouth and between 

 the lips. In drinking they plunge their mouth into the water 

 and often "chew" it. It is hard to make theni move, they 

 step around clumsily, won't "get over" when commanded to 



Fig:. 51. 



Horse with chronic hydrocephalus. 



do so; they are hard to guide when driven, try "to stay over 

 on one side ; if badly affected they cannot be used for serv- 

 ice because they do not recognize commands. According to 

 the degree of mental depression we recognize : 



Dullness : 



Soiiuiolciicy, slccl-'iiicss, dro'icsiiicss, from which the pa- 

 tient is easily roused. 



Sopor, profound sleep, rousing difficult. 



Coma, profound insensibilit}-. 



A dulling of the psychic functions occurs in ; 



