Regional anatomy in its relation to medicine and surgery . The extensor ossis metacarpi pollicis muscle. 2. The extensor primi internodii pollicis muscle. 3. The extensor secundi internodii pollicis muscle. 4. The tendon of the extensor carpi radialis brevior The tendon of the extensor carpi radialis longiormuscle. 6. Branches of the radial nerve to the thumb and index finger. 7. The posterior annular ligament. 8. The common nerve to the adjacent sides of the thumb and index finger. 9. The abductor pollicis muscle. 10. The nerves to the adjacent sides of the index and mid- dle finger
Regional anatomy in its relation to medicine and surgery . The extensor ossis metacarpi pollicis muscle. 2. The extensor primi internodii pollicis muscle. 3. The extensor secundi internodii pollicis muscle. 4. The tendon of the extensor carpi radialis brevior The tendon of the extensor carpi radialis longiormuscle. 6. Branches of the radial nerve to the thumb and index finger. 7. The posterior annular ligament. 8. The common nerve to the adjacent sides of the thumb and index finger. 9. The abductor pollicis muscle. 10. The nerves to the adjacent sides of the index and mid- dle fingers. 11. The tendon of the index finger in its aponeurotic sheath. 12. The extensor carpi ulnaris muscle. 13. The shaft of the ulnar. 14. The third dorsal interosseous muscle. 15. The branches of the ulnar nerve to the ring and little fingers. 16. Common nerve to the adjacent sides of the ring and middle fingers. 17. The tendon to the middle finger from the common extensor muscle. 18. One of the dorsal interossel arteries. Plate 49 Vol I Fig ! FiiS 2 Fi2 3. Copyright, I8S0, by GioMc Mc a •co/fCO/^co^cof^(of^ioffcof^(of^cjffco/^cof^cof^cof^ijffcof^cof^cjffCof^s^ Mc. Clellai^, MD. THE REGION OF THE ELBOW. 367 forearm inclines inward, so that the hand is brought toward the middleline of the body, and also why it is not possible for the hand to beplaced flat upon the shoulder of the same side. When the forearm isextended, the epicondyles of the humerus and the olecranon process ofthe ulna will be found to lie in a direct transverse line, but when it isflexed these points form a triangle, the olecranon being brought forwardin front of the transverse line through the epicondyles. The olecranonprocess is nearer to the internal than to the outer epicondyle. When theolecranon is very prominent, its summit will be found in extreme exten-sion above the transverse line. These bony prominences constitute thechief landmarks of this region, and, as they can always be felt throughthe
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