520 
PAKALYSIS OF BRACHIAL PLEXUS. 
at each attempt to place weight on the limb. The limb w 7 as also abnor¬ 
mally abducted. 
Trasbot describes a case of paralysis of the brachial plexus in which 
hemiplegia appeared later. Becovery occurred in fifteen days. This case 
is also not quite clear. Wilson saw hemiplegia in a horse after rolling 
over backwards, and Anacker has seen it in a sucking-pig. 
In dogs it is commoner, and occurs both as peripheral paralysis and as 
hemiplegia. In the latter condition Moller repeatedly saw well-marked 
spastic lameness in all the muscles of the shoulder, most notably in the 
triceps group; this was followed by long-continued disturbance in move¬ 
ment. Paralysis of the brachial plexus in horses is sometimes of central 
origin ; in these cases other troubles precede, accompany, or follow it. 
A seven year old mare showed in December, 1887, right-sided facial 
paralysis; in January, 1888, left-sided hemiplegia. The toe of the left 
fore foot w 7 as dragged along the ground. Soon afterwards a small 
cataract appeared in the right eye, and gradually extended over the 
entire lens. The post-mortem showed a tumour as large as a walnut 
between the petrous portion of the right temporal bone and the cere¬ 
bellum ; it extended to the pons varolii and restiform bodies of the 
medulla. Its interior was occupied by a small quantity of pus. 
In another horse, lameness of the right hind leg suddenly appeared, 
followed in two days by paralysis of the right fore leg. The post-mortem 
showed haemorrhagic spots in the right half of the cerebrum and cere¬ 
bellum. Similar symptoms were seen in another case, but disappeared 
in twenty-five days. 
Shocks from the high-pressure currents used to operate street trams 
or railways may produce brachial paralysis, wdiich, however, passes away, 
provided the shock has only been momentary. Lightning stroke pro¬ 
duced paralysis of the brachial plexus in a Prussian army horse, but 
the condition disappeared again in a few days. 
Another case occurred in the Abort clinique. A horse was cast and 
kept down for a long time. On rising it showed complete paralysis 
of one fore limb. Post-mortem examination showed that the brachial 
plexus had been bruised and paralysed by a bony tumour on the 
second rib. 
Many cases of brachial paralysis are produced in this way, resulting 
from bruising, subscapular bleeding, deep-seated abscess formation, the 
growth of tumours on the inner surface of the shoulder, or even from 
direct injury like that due to the deep penetration of a carriage shaft. 
The symptoms which accompany paralysis of the brachial plexus 
depend on whether paralysis is complete. Complete paralysis of the 
entire axillary plexus prevents all voluntary movement in the limb. 
Provided, however, the foot be placed in the proper position, the limb, 
