. Cunningham's Text-book of anatomy. Anatomy. 712 THE NERVOUS SYSTEM. Ramus Supeeficialis Nervi Radialis. The superficial ramus ( radial nerve) tribution. Arising in the hollow of the elbow Kadial nerve Superficial ramus Deep ramus Deep ramus -â Muscular brandies to superficial muscles Dorsal interosseous artery " Dorsal interosseous nerve f Muscular branch to abductor pollicis longus .J-f IJflllgM Muscular branch to extensor pollicis longus Ar0Jr!Iff~*' Muscular branch to extensor indicis proprius â¢âff"»Vj Muscular branch to extensor pollicis brevis Terminal brancli to carpal
. Cunningham's Text-book of anatomy. Anatomy. 712 THE NERVOUS SYSTEM. Ramus Supeeficialis Nervi Radialis. The superficial ramus ( radial nerve) tribution. Arising in the hollow of the elbow Kadial nerve Superficial ramus Deep ramus Deep ramus -â Muscular brandies to superficial muscles Dorsal interosseous artery " Dorsal interosseous nerve f Muscular branch to abductor pollicis longus .J-f IJflllgM Muscular branch to extensor pollicis longus Ar0Jr!Iff~*' Muscular branch to extensor indicis proprius â¢âff"»Vj Muscular branch to extensor pollicis brevis Terminal brancli to carpal joints. Fig. 621.âDistribution of the Deep Branch of the Radial Nerve. is entirely cutaneous in its dis- beneath the brachio-radialis, it courses distally under cover of that muscle through the proximal two-thirds of the forearm, and accompanies the radial artery in the middle third of the forearm. It then passes posteriorly beneath the tendon of the brachio-radialis and pierces the deep fascia on the lateral aspect of the fore- arm in the distal third. It is distributed to the skin of the dorsum of the wrist, the lateral side and the dorsum of the hand, and the dorsum of the thumb and lateral two and a half fingers (Fig. 618, p. 707). Its branches communicate on the ball of the thumb with the musculo-cutaneous nerve, and on the dorsum of the hand with the dorsal branch of the ulnar nerve {ramus anastomoticus ulnaris). The digital nerves are small, and are five in number. Two pass to the back of the thumb and reach the level of the inter-phalangeal articulation. One supplies the lateral side of the index finger as far as the second phalanx. The re- maining two branches divide at the clefts between the second and third, and third and fourth fingers respect- ively, and innervate the ad- jacent sides of these fingers as far as the second phalanx. The rest of the skin of these digits to the tips is supplied by digital branches of the median nerve. The nerve may only supply t
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