. The anatomy of the human body. Human anatomy; Anatomy. THE BICEPS, 245 lar origins, and tumjng them inward and outward. In order to trace the whole extent of the long head of the biceps, open the capsular hgament above ; and to see the radial insertion of the muscle, flex the forearm to a right angle upon the arm, and supinate it forcibly; it is better, however, to wait until the muscles of the anterior region of the fore- arm are dissected. The biceps flexor cubiti (a, fig. 116) is a long muscle forming the superficial layer of the Fig. anterior region of the arm ; it is divided abov
. The anatomy of the human body. Human anatomy; Anatomy. THE BICEPS, 245 lar origins, and tumjng them inward and outward. In order to trace the whole extent of the long head of the biceps, open the capsular hgament above ; and to see the radial insertion of the muscle, flex the forearm to a right angle upon the arm, and supinate it forcibly; it is better, however, to wait until the muscles of the anterior region of the fore- arm are dissected. The biceps flexor cubiti (a, fig. 116) is a long muscle forming the superficial layer of the Fig. anterior region of the arm ; it is divided above into a short and long head ;* and hence its name biceps. Attachments.—It arises by its short head from the apex of the coracoid process, and by its long head from the top of th-e glenoid cavity; and is inserted into the bicipital tuberosity of the radius. The origin of the short or coracoid head {b,fig. 116) consists of a flat and very thick tendon, common to it and the coraco- brachialis, and terminating in front of this part of the muscle in an aponeurosis, from which is given off a tendinous septum, be- tween the biceps and the coraco-brachialis. The long, glenoid, or reflected head arises by a tendon apparently forming a contin- uation of the glenoid articular border, which penetrates into the interior of the joint, turns over the head of the humerus, upon which it is reflected, and thus reaches the bicipital groove. It is retained in this groove by a sort of fibrous bridge or canal, traverses the whole of its extent, and ends in a sort of tendinous cone open behind, from the interior of which the fleshy fibres take their origin. These fibres are collected into a rounded belly, which, about the middle of the arm, is applied to the muscular belly of the short portion, equally rounded and of variable size, and ultimately becomes identified with it. The single muscle {a, fig. 116) thus formed is very thick, flattened from before backward, and directed vertically like the t
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