523 
S. J. J. HARGER. 
siological phenomena .of the degeneration of the foot ; but I 
could not obtain all the necessary data in time, and will reserve 
this subject for an article to be published in the near future. 
Brown, Sequard, and Chauveau have severed the sciatic nerves 
of rabbits without any retrograde phenomena in the leg. The 
first in the tissues is a vaso-motor paralysis which is only tem¬ 
porary and disappears in the course of three or four days. The 
pathological changes in the foot, according to my observation, 
seem to be of an inflammatory nature—a suppuration inflamma¬ 
tion. The causes of this condition may be two-fold ; the trophic 
influence of the nerves and traumatisms. The former is the 
predisposing cause, but at times may be the direct or exciting 
cause ; the latter is the exciting cause. By traumatisms I do 
not only mean accidental injuries, but those which result from 
the ordinary function of the foot. Injuries to the skin of the 
nerved foot heal with difficulty. I have seen the foot suppurate 
in consequence of a blister applied to the coronet. Beyond this, 
I shall not discuss the question here. 
Neuroma .—These are true and false. The latter is a neuro- 
fiboma and seldom cause lameness. The treatment is excision. 
STATISTICAL CLASSIFICATION OF CASES. 
HIGH NEURECTOMY. 
i. Geld. 
Navic. (sing.) 
Operation, 1880. 
1885 sound. 
5 years. 
2. Mare. 
<< (t 
“ 1890. 
1 year. 
t ( 
Lame both feet. 
2d operation, 1891. 
Sound when seen last. 
6 months. 
V Geld. 
Ringbone (post.) 
Operation, 1887. 
Permanently sound. 
5 years. 
4 - “ 
“ (ant.) 
“ 1890. 
Died from tetanus. 
1 year. 
5 . “ 
“ (post.) 
“ 1890. 
Permanently sound when seen 
last. 
1 year. 
6 . 
Navic. (double) 
“ 1882. 
Sound when seen last. 
Tendons broke down. 
2 months. 
(i 
7 - 
(( < ( 
“ 1883. 
Partially sound. 
Neuromas, broke down. 
2 months. 
8. “ 
9 - “ 
Acute laminitis. 
Ringbone (hind) 
“ Jan., 1886. 
Both arteries cut. 
Operation, Nov., ’88. 
Bad. 
Foot sloughed 
Unsuccessful. 
10. Grey pony 
Navic. (sing.) 
“ Aug., 1891. 
Still sound. 
Two years ago had suppuration 
of quarter and sole. 
4 years. 
11. Geld. 
.. 
“ Apr., 1891. 
Sound. 
1 year. 
Foot sloughed 
12. “ 
“ “ 
“ June, 1892. 
Still sound. 
2 years. 
13- “ 
.. 
“ Oct., 1892. 
Did well for 
Lame from neuroma. Removed. 
6 months, 
not doing well 
14. 
U it 
“ Aug., 1892. 
Still sound. 
2 years. 
i 5 - “ 
it a 
“ Feb., 1889. 
Still working. 
I 5/4 years. 
