CJLNAR NEURECTOMY. 
621 
ULNAE NEURECTOMY 
may prove useful. Throughout the whole extent of the fore arm the 
ulnar cutaneous nerve, accompanied by the ulnar artery and vein, is 
situate between the oblique and external flexors of the metacarpus, and 
immediately under the fascia uniting them. By palpation with the 
finger tips the muscular interspace which fixes the line of operation is 
readily discovered. 
In performing this operation the horse is cast on the sound side. The 
affected limb is left in the hobbles, but drawn tense by means of two 
strips of webbing, one fixed on the upper portion of the cannon bone 
Figs. 242 and 243.—Neurectomy of the ulnar nerve. FE, Flexor metacarpi extern us; FO, flexor 
metacarpi obliquus ; N, ulnar nerve ; AV, ulnar artery and nerve. 
being pulled backwards, the other, attached to the coronet, in a forward 
direction. Two assistants, holding the free ends, keep the parts steady. 
The operator kneels in front of the upper part of the fore arm ; the 
point selected is 4 to 6 inches above the knee. 
The parts having been prepared, he makes at the point just indicated, 
an incision about 1J to 1J inches long through the skin. The sub¬ 
cutaneous connective tissue, the antibrachial aponeurosis, and the fascia 
which unites the aponeurotic covering of the two muscles are then divided. 
With forceps and bistoury the connective tissue surrounding the nerve 
is dissected away, following the direction of the wound, and carefully 
