1 86 Veteri7iary Medicine. 



of rheumatism, and in the lower animals muscular stiffness and 

 contractions which suggest a similar condition. In man, too, 

 gout is a common factor, and in pigs and birds in which this con- 

 dition exists, stiffness and evidence of suffering may well be at 

 times attributed to a similar cause. How many other forms of 

 chronic metallic poisoning and poisoning by morbid autochtho- 

 nous products of indigestion are attended by di.sorders of innerva- 

 tion and nutrition, it is as j^et impossible to say. The direct 

 action of cold, an anaemic condition of the nerves, and reflex 

 action from distant sources of irritation are among the other in- 

 voked causes. Inflammation in the nervi nej'voriim is also invoked 

 as a factor, but in this case the S5aiiptoms would not accord with 

 the rule given above, since the nerve trunks would be very tender 

 to touch or pressure, and the suffering would be unshifting and 

 shown permanently in the one seat. 



Facial Neuralgia. Lafosse and Zundel describe as cases of 

 this kind those in which periodically the horse's eyes are fixed 

 and slaining, the ears drawn back and depressed as in vice, the 

 head at intervals bent on the neck, with plaintive neighing, rub- 

 bing the head on the stall and pawing. Those cases of twitching 

 of the head or rapid jerking of the ears in horses, when the}^ 

 have been driven for some distance, and which are relieved b}'^ 

 wearing a close net over the nostril or by section of the trifacial 

 nerve at the infra-orbital foramen, manifestly partake of this 

 character. 



Cervico-Occipital Neuralgia. L,atosse speaks of this as 

 often mistaken for torticolis, tlie head being turned to the af- 

 fected side during the paroxysms. In man this is often a result 

 of cold draughts on the back of the head, and associated with 

 tender points on the course of the nerve, between the mastoid 

 and the median line. 



Dorso-intercostal neuralgia causes pain in deep in.spiration, 

 and lumbo-abdominal neuralgia develops tenderness in the 

 loins, in one testicle, or in one lip of the vulva according to 

 Lafosse. Diagnosis between such cases and neuritis, spinal 

 disease, and other obscure nervous affections must be very 

 problematical. 



Sciatic Neuralgia. This is described by Zundel as causing 

 jerking and lameness in the affected limb, sometimes aggravated 



