Medical and surgical therapy . pect of the forearm betweenthe two heads of the flexor carpi ulnaris. At about 8 cm. below the bend of the elbow (fig. 17) it is joinedby the ulnar artery. For about 10 cm. it is covered by the thicklayer of the epitrochlear muscles, and lies on the flexor profundusdigitorum : then it becomes more and more superficial. It is only in the forearm that the ulnar nerve gives off important 80 90 CLINICAL FORMS OF NERVE LESIONS branches, viz. muscular braiidies near the elbow, to the flexor oarpiulnuris as it passes between its two heads, and a little lower at theupper
Medical and surgical therapy . pect of the forearm betweenthe two heads of the flexor carpi ulnaris. At about 8 cm. below the bend of the elbow (fig. 17) it is joinedby the ulnar artery. For about 10 cm. it is covered by the thicklayer of the epitrochlear muscles, and lies on the flexor profundusdigitorum : then it becomes more and more superficial. It is only in the forearm that the ulnar nerve gives off important 80 90 CLINICAL FORMS OF NERVE LESIONS branches, viz. muscular braiidies near the elbow, to the flexor oarpiulnuris as it passes between its two heads, and a little lower at theupper third of the forearm to the inner half of the flexor profundusdigitorum. The dorsal cutaneous branch arises four fingers breadths above thewrist; it runs downwards, inwards, and backwards, and it suppliesthe skin on the inner side of the back of the hand, the dorsal aspectof the little finger, and part of the dorsal aspect of the ring andmiddle fingers (fig. 33). At the wrist the uhiar nerve, which is now very superficial, is. Fig. 33.—Distribution of the nerves on the dorsal aspect of the hand. on the outer side of tlie pisiform bone, and immediately below thisbone divides into its two terminal branches. The superficial branch supplies the skin of the hypothenareminence, and furnishes the last three collateral nerves of thefingers (fig. 33). It gives a small muscular branch to the palmarisbrevis. The deep branch, which is nmscular, passes between the abductorand flexor brevis minimi digiti, and runs veiy deep down in closerelationsliip with the metacaq)als and interossei, accompanied bythe deep })almar arch. It sends motor filaments to all the musclesof the hypothetvar eminence, to the two inner lumbricales, to all THE ULNAR NERVE 91 the pahnar and dorsal inierossei, and then ends by supplying theadductor poll iris and the inner head of the flexor brevls pollicis. AnaHtoniosis of the ulnar witli tlie median nerve oceufs twice—in the liand by nicauH of its suporfioial palm
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1918
