. Cunningham's Text-book of anatomy. Anatomy. THE FOKEAKM AND HAND. 145; At the dorsum of the forearm the intermuscular septum between the radial and common extensors corresponds to the proximal part of a line extending from the lateral epicondyle of the humerus to the tubercle on the dorsum of the distal end of the radius. The dorsal interosseous nerve, at the point at which it emerges from the substance of the supinator muscle, will be found at the bottom of this septum, 2 in. distal to the head of the radius; below this point the septum is the best line along which to cut down upon the post
. Cunningham's Text-book of anatomy. Anatomy. THE FOKEAKM AND HAND. 145; At the dorsum of the forearm the intermuscular septum between the radial and common extensors corresponds to the proximal part of a line extending from the lateral epicondyle of the humerus to the tubercle on the dorsum of the distal end of the radius. The dorsal interosseous nerve, at the point at which it emerges from the substance of the supinator muscle, will be found at the bottom of this septum, 2 in. distal to the head of the radius; below this point the septum is the best line along which to cut down upon the posterior surface of the radius. Winding across the distal third of this surface is an oblique prominence caused by the abductor pollicis longns and extensor pollicis brevis Styloid process of third metacarpal Radial artery- Extensor pollicis longus Extensor carpi radialis longu Extensor carpi radialis brevi Extensor pollicis brevi Base of fifth metacarpal Styloid process of ulna Extensor digitorum communis Extensor digit! quinti communis Extensor carpi ulnaris Fig. 1117.—Dorsal Aspect of Hand. The flexor sheaths of the palm and of the digits are of surgical importance in consequence of their liability to suppurative inflammation. The common flexor sheath beoins Ih in. proximal to the transverse carpal ligament, under which it extends to a little below the middle of the palm. The digital flexor sheaths extend from the bases of the terminal phalanges to the level of the distal transverse crease of the palm, opposite the necks of the metacarpal bones, with the exception of the sheath of the little finger, which is continuous with the common flexor sheath of the palm. The sheath of the flexor pollicis longus extends from the base of the terminal phalanx proximally to a point about 1 in. proximal to the transverse carpal ligament; it frequently communicates with the common flexor sheath. From this anatomical arrangement it follows that suppuration in the sheaths of the litt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
