MEDIAN NEURECTOMY. 
11 
cal and first and second dorsal pairs and leaves the posterior 
part of the brachial plexus and passes under the axillary artery 
to gain the front of the humeral artery, which it follows to its 
termination, which is from before backward and from above 
downward; it then accompanies the posterior radial to the 
humero-radial articulation and then crosses over outwardly the 
latter artery to become posterior to it, in which position it con¬ 
tinues down the leg, but not so deeply situated as the artery. 
At its arrival at the above articulation it gives branches to the 
internal flexor of the metacarpus and to the two flexors of the 
phalanges. 
The artery has been sufficiently described when describing 
the nerve and it will also do for the vein, which is formed from 
the metacarpal veins and always accompanies the artery and 
nerve ; these relations you will find to be the most constant. 
The instruments required are two scalpels or bistouries, curved 
scissors, blunt retractors, plain dissecting forceps, director, 
aneurism hook, syringe and cocaine. 
The animal is cast upon the side upon which the operation 
is performed, any hobbles will do that allow of removing one of 
the legs, upon which the side bar is placed, the other end to the 
coronet or shin of one of the legs, which are still fast in the hob¬ 
bles. I should here state that before casting I inject cocaine at 
the seat of operation, and by the time you are ready to operate 
anaesthesia of the skin and subjacent tissue is complete ; now clip 
hair as close as possible and sterilize the skin, the instruments 
having been previously sterilized. 
Let us now proceed to the operation, and I wish to state that 
the neatness and rapidity of performing the operation depends 
wholly on where the incision is made. This remark will probably 
bring to our mind, where are we to make the incision and by 
what landmarks, so to speak, are we enabled to decide upon the 
exact location. Without reference to others, I will try to make 
plain how to select the place. Place the finger at a point be¬ 
tween the postero-internal border of the radius (which can be 
plainly felt) and chestnut, which is on the inside of the forearm 
