SECTION III. 
DISEASES OF THE BRAIN AND NERVOUS SYSTEM 
48S0RS8 WITHIN THE SUBSTANCE oF THE BRAIN—HyYDROCEPHALUS, OR DROPsY Os 
THe Brain—SromacH STaGGERS—APOPLEXY, OR CEREBRAL HEMORRHAGE ~ 
ApopLexy oF Sprnz, oR SprInAL HEMORRHAGE, PRODUCING PARAPIILEGIA— 
Epinersy, or Firs—Trtanus—VERTIGO—ACUTE OR GENERAL DIskase OF THY 
BRAIN, KNOWN As ENCEPHALITIS—SLEEPY STaaarrs—CEREBRAL MENINGITIS- - 
Cuorka, on STRINGHALT. 
ABSCESS WITHIN THE SUBSTANCE OF THE BRAIN. 
HE author, having some doubts about the curability of abscers 
- within the brain, can not offer the reader much encourage- 
ment us regards tne cure; yet, tur tne purposes of research, and in 
view of prosecuting our Samaritan-like calling on a nuble and 
valuable animal, it is proper that the reader he pnt in pessession 
of the facts in the case. The symptoms and morb d conditions 
connected with various forms of brain disease are, at the present 
state of our knowledge, very obscure. Liven in human practice, the 
authorities contend that the subject of symptoms and conditions is 
full of uncertainty and apparent irregularity. Doubtless there is 
some constant and uniform connection of cause and effect between 
the altered physical states of the brain and the altered manifesta- 
tions of its functions, but we have not yet been successful in our 
search after those setiled relations, nor have we but partial and 
imperfect glimpses of them. 
Causzs.—It is probable that the same causes which produce 
abscess in other parts of the bedy, not clearly traceable to local 
injuries, are operative in regard to the brain. Abscess is, as a 
matter of course, always preceded by an active stage, known av 
inflammatory, and when not called into existence by local injury, 
must depend on both predisposing and exciting causes. The pre- 
disposition lurks in breed, and the exciting causes may be az.ong 
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