. Anatomy, descriptive and applied. Anatomy. 308 THE ARTICULATIONS, OR JOINTS tissue which bridges across the notch between the olecranon and coronoid pro- cesses. This ligament is in relation, internally, with the Triceps and Flexor carpi ulnaris muscles and the ulnar nerve, and gives origin to part of the Flexor sublimis digitorum muscle. The external lateral ligament {ligamenhmi collatemle radiale) (Fig. 249) is a short and narrow fibrous band less distinct than the internal, attached, above, to a depression below the external condyle of the humerus; below, to the orbicular ligament, some o
. Anatomy, descriptive and applied. Anatomy. 308 THE ARTICULATIONS, OR JOINTS tissue which bridges across the notch between the olecranon and coronoid pro- cesses. This ligament is in relation, internally, with the Triceps and Flexor carpi ulnaris muscles and the ulnar nerve, and gives origin to part of the Flexor sublimis digitorum muscle. The external lateral ligament {ligamenhmi collatemle radiale) (Fig. 249) is a short and narrow fibrous band less distinct than the internal, attached, above, to a depression below the external condyle of the humerus; below, to the orbicular ligament, some of its most posterior fibres passing over that ligament, to be inserted into the outer margin of the ulna. This ligament is intimately blended with the tendon of origin of the Supinator [brevis] muscle. Synovial Membrane (Fig. 250).—The synovial itiembrane is very extensive. It covers the margin of the articular surface of the humerus, and lines the coronoid and olecranon fossae on that bone; from these points it is reflected over the anterior, posterior, and lateral ligaments, and forms a pouch (recessus sacciformis) between the lesser sigmoid cavity, the internal surface of the orbicular ligament, and the circumference of the head of the radius. Projecting into the cavity is a crescentic fold of synovial membrane, between the radius and ulna, suggesting the division of the joint into two—one the humeroradial, the other the humeroulnar. Between the capsular ligament and the synovial membrane are three masses of fat—one, the largest, above the olecranon fossa, which is pressed into the fossa by the Triceps during flexion; a second, over the coronoid fossa; and a third, over the radial fossa. The two last-named pads are pressed into their respective fossse during extension. The muscles (Fig. 251) in relation with the joint are, in front, the Brachialis anticus; behind, the Triceps and Anconeus; externally, the Supinator [brevis] and the common tendon of origin of the Extens
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
