Diseases of the Nervous System. 261 



proved ; but that it has some foundation in fact may be 

 deduced by reference to the extensive derangement in the 

 other nerve regions, particularly in the branch of the fifth 

 pair supplying the lower jaw. 



Alterations in the ophthalmic branch are likewise few 

 when those of the maxillary are so — proving, apparently, 

 that the lesion is central. 



According to Professor Benedikt (^"Wiener Med. Presse," 

 No. 74)* the disease is a special acute exudative inflam- 

 mation of the brain, resulting in various forms of hyaloid 

 degeneration, which is particularly observed in the neigh- 

 bourhood of the lenticular nucleus of the anterior lobe — 

 often in this alone. Siedamgrotzky states that he has, in 

 his examinations, been particularly careful to inquire into 

 the correctness of this ; and in some cases of " dumb mad- 

 ness " there was certainly a marked inflammatory condition 

 of a portion of the brain about the fissure of Sylvius. 



In the "Giornale di Anatomia," etc., edited by the 

 veterinary professors at the University of Pisa, Rivolta 

 gives the description of a careful examination he made of 

 the brains of seven dogs which had perished from furious 

 rabies transmitted to them by inoculation. The result 

 goes to show that the pathological alterations in that organ 

 consist mainly in more or less marked hyperaemia of the 

 pia mater in the cerebral fissures, but especially at the base 

 of the brain, and this hyperaemia is never absent from the 

 cerebral plexus choroides ; that softening of the cerebral 

 substance is not frequent, though, on the contrary, the grey 

 substance is constantly higher coloured ; and that perivas- 

 cular infiltration of a fatty nature cannot be recognised as 

 characteristic of this disease, as Rivolta has noticed it in 

 other maladies.t 



In the " Centralblatt fur die Medicin-Wissenschaften," 



•From the "Veterinary Journal," October, 1876 

 t Ibid. % Ibid. 



