. Anatomy, descriptive and applied. Anatomy. THE POHTEEIOR RADIOULNAR REGION 481 slips or lateral vincula which join the tendon of the ring finger to the tendon of the little finger and to the tendon of the middle finger are constant. If the middle and little fingers are held flexed the lateral vincula greatly limit the range of exten- sion possible in the ring finger. Relations.—By its superficial surface, with the fascia of the forearm and hand, the posterior annular Ufjauient, and integument; by its deep surface, with the Supinator [brevis], the Extensol muscles of the thumb and index finge
. Anatomy, descriptive and applied. Anatomy. THE POHTEEIOR RADIOULNAR REGION 481 slips or lateral vincula which join the tendon of the ring finger to the tendon of the little finger and to the tendon of the middle finger are constant. If the middle and little fingers are held flexed the lateral vincula greatly limit the range of exten- sion possible in the ring finger. Relations.—By its superficial surface, with the fascia of the forearm and hand, the posterior annular Ufjauient, and integument; by its deep surface, with the Supinator [brevis], the Extensol muscles of the thumb and index finger, the posterior interosseous vessels and nerve, the wrist- joint, carpus, metacarpus, and phalanges; by its radial border, with the Extensor carpi radialis brevior; by its ulnar border, with the Extensor minimi digiti and Extensor carpi ulnaris. [brevis] EXTENSOR LONGU Origin of f aponeurosis < common to: (.flexor. EXTENSOR C EXTENSOR INDICIS Fig. 358.—Diagram showing attachments of muscles of forearm and hand. Posterior aspect. Origins, red; insertions, blue. The origins and insertions of the Dorsal interossei muscles are omitted. ^See Fig. 151.) The Extensor minimi digiti (m. extensor digiti quinti proprius) is a slender muscle placed on the inner side of the Extensor communis, with which it is gen- erally connected. It arises from the common Extensor tendon by a thin, tendin- ous slip, and from the intermuscular septa between it and the adjacent muscles. Its tendon runs through a separate compartment in the annular ligament behind the inferior radioulnar joint, then divides into two as it crosses the hand, the outermost division being joined by the slip from the innermost tendon of the common Extensor, The two slips thus formed spread into a broad aponeurosis, which, after receiving a slip from the Abductor minimi digiti, is inserted into the second and third phalanges of the little finger. The tendon is situated on the ulnar side of, and is somewhat more superficial
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
