A manual of anatomy . exor brevis and abductorquinti digiti, opponens quinti digiti, interossei, lumbricales (thirdand fourth), adductor pollicis and flexor pollicis brevis (deep part). The axillary, or circumflex nerve («. axillaris), is derived from thedorsal cord (C. 5, 6). It is large and passes from the axilla, windsaround the surgical neck of the humerus and ends by giving branchesto the m. deltoideus. It also gives muscular branches to the m. teresminor, articular branches to the shoulder joint and a large cutaneousbranch to the skin of the proximal half of the lateral surface of thearm
A manual of anatomy . exor brevis and abductorquinti digiti, opponens quinti digiti, interossei, lumbricales (thirdand fourth), adductor pollicis and flexor pollicis brevis (deep part). The axillary, or circumflex nerve («. axillaris), is derived from thedorsal cord (C. 5, 6). It is large and passes from the axilla, windsaround the surgical neck of the humerus and ends by giving branchesto the m. deltoideus. It also gives muscular branches to the m. teresminor, articular branches to the shoulder joint and a large cutaneousbranch to the skin of the proximal half of the lateral surface of thearm. The radial, or musculospiral nerve {n. radialis), is derived from allof the nerves of the dorsal cord. It leaves the axilla and passes to THE RADIAL NERVE 457 the bend of the elbow along the radial groove on the dorsal surfaceof the humerus. It divides into superficial and deep terminalbranches. In its course through the arm it gives off a number ofbranches. The muscular branches are distributed to the mm. triceps,. Fig. 323.—Nerves of the left upper extremity. anconeus, brachialis, brachioradialis, extensor carpi radialis longusand at times the brevis. The posterior cutaneous brachial nerve {theupper internal cutaneous branch of the musculospiral) supplies theskin of the first third of the medial surface of the arm. The dorsal 45^ THE NERVE SYSTEM cutaneous nerve of the forearm supplies the skin of the dorsal surfaceof the arm (last third) and of the first two-thirds of the forearm. The terminal branches are the superficial and deep rami. Thesuperficial ramus, or old radial nerve arises near the elbow, passesalong the lateral part of the forearm and in the lower third it passesto the dorsal surface to end in branches that supply the skin of theback of the wrist and some of the fingers. Its digital branches arefive in number; the first three supply both sides of the thumb and theradial side of the index finger. The other two branches divide intotwo each for the contiguous
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
