262 PBIN0IPLE8 OP VETEEINABT SUBGEBT 



peared. Of course I have injected lots of horses without get- 

 ting any results but temporary ones, and these were simply 

 neurectomized subsequently. 



Therefore, it seems proper to employ a cocaine-morphine 

 injection with a view to produce a cure in these and similar 

 cases instead of neurectomizing the patient at once. 



What changes take place in a nev/rectomised nerve ? 



The whole of the peripheral part of the nerve — that is, that 

 portion severed from the nerve trunk — undergoes granular 

 and fatty degeneration ; one may term it a descending degen- 

 eration; while from the central stump gradually a collateral 

 anastomosis is established, eventually endowing the peripheral 

 parts with limited nerve supply. But in those cases where the 

 neurectomy wound has undergone purulent changes, and as 

 the result of pus formation granulations became established 

 and the nerve amputated below the upper wound commis- 

 sure, thus allowing pinching and tugging upon the central 

 nerve stump, interstitial inflammation of a chronic nature is 

 the result and consequently a false neuroma. 



DISEASES OF ARTERIES. 



Arteritis. 



What is arteritis ? 



Inflammation of an artery. 

 Name the varieties of arteritis. 



1. Endarteritis (inflammation of the inner coat). 



2. Mesarteritis (inflammation of the middle coat). 



3. Periarteritis (inflammation of the external coat). 

 What forms of arteritis are recognized ? 



According to the course of the inflammation, it may ba 



