. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 86 MUSCLES OF THE FORE-ARM. Fig. 67. and from the interosseous ligament. Insertion, the tendons are four in number, which, passing through the perforations in the tendons of the flexor sublimus, are inserted into the third phalanges of the fingers. Flexor longus pollicis.^—Origin, from the internal condyle of the humerus, and the middle two-thirds of the radius, and a part of the interosseous ligament, hi&ertion,
. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 86 MUSCLES OF THE FORE-ARM. Fig. 67. and from the interosseous ligament. Insertion, the tendons are four in number, which, passing through the perforations in the tendons of the flexor sublimus, are inserted into the third phalanges of the fingers. Flexor longus pollicis.^—Origin, from the internal condyle of the humerus, and the middle two-thirds of the radius, and a part of the interosseous ligament, hi&ertion, into the base of the second phalanx of the thumb. (Fig. 66.) Pronator quadratus.^—Origin, from the inner surface of the ulna, near its lower ex- tremity. Insertion, into the corresponding surface of the radius. Use; it rotates the radius inwards. Supinator radii longus.^^ (Fig. 67.)— Origin, from the ridge leading to the ex- ternal condyle of the humerus. Insertion into a ridge of the radius just above its styloid process.' Use ; it rotates the radius outwards. Extensor carpi radialis longus J'—(Fig. ^^.) Origin, From the ridge of the external condyle of the humerus. Insertion, into the posterior part of the base of the metacarpal bone of the forefinger. Use; it extends the hand. Extensar carpi radialis bi'evis.^—Origin, from the external condyle of the humerus, and from the external lateral ligament. In- sertion, into the posterior part of the base of the metacarpal bone of the middle finger. Use; as the last. Extensor carpi ulnaris,^^—Origin^ from the external condyle an,d the brachial fascia. hisertion, into the base of the nrjetacarpal bone of the little finger. Use; as the last. Extensor digitarum cominunis.^—Origin^ from the external condyle. Insertiq^i, by four tendons which are connected by slips previous to their being spread out, into a membranous insertion, into all the phalangps of the fingers. Use; it extends the joints of the fingers. Supinator radi
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