. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 84 MUSCLES OF THE FORE-ARM. Fig. 64. with the ten^n of the latissimus dorsi. Use ; it rotates the hu- merus inwards and draws it downwards and backwards. Subscapularis* (Fig. 64.) Origin^ from the whole of the costa of the scapula, hisertlon^ into the lower tuberosity of the humerus. Use ; it rotates the humerus inwards, and draws it downwards. Biceps flexor cuhiti.'^—Origin^ by a long tendon from the superior extrem
. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 84 MUSCLES OF THE FORE-ARM. Fig. 64. with the ten^n of the latissimus dorsi. Use ; it rotates the hu- merus inwards and draws it downwards and backwards. Subscapularis* (Fig. 64.) Origin^ from the whole of the costa of the scapula, hisertlon^ into the lower tuberosity of the humerus. Use ; it rotates the humerus inwards, and draws it downwards. Biceps flexor cuhiti.'^—Origin^ by a long tendon from the superior extremity of the glenoid cavity, which passes through the joint and bicipital groove, and by a short head from the coracoid process of the scapula. Insertion, into the posterior and inferior parts of the tubercle of the radius, and into the brachial fascia. Use; it flexes the fore-arm. Coraco-brachialis.^—Origi?i, from the middle facet of the coracoid process of the scapula, in common with the short head of the biceps. Insertion,, into the middle of the OS humeri by a rough ridge on its in- ternal side. Use; it draws the arm up- wards and forwards. Brachialis Internus.^—Origin, from the anterior and lower half of the os humeri. Insertion, in front of the root of the coro- noid process of the ulna. Use; it flexes the fore-arm. Triceps extensor cuhiti}^—Origin, by three heads ; the first or longus, is from the inferior part of the glenoid cavity. The second or brevis, is from a ridge from the back part of the os humeri, just below its head ; and the third, or brachialis externus, is from the inner side of the os humeri, near the bicipital groove, hisertion, into the olecranon process of the ulna. Use ; it extends the fore-arm. Anconeus.^'^ (Fig. 67.)—Origin, from the external condyle of the humerus. Insertion, into the ulna below the olecranon. Use ; it extends the fore-arm. MUSCLES OF THE FORE-ARM. These are eighteen in number, eight of which are on the front of the arm, and
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