OCR Text |
Show 546 MR. F. E. BEDDABD ON THE [Nov. 18, the coracoid and from the coracoclavicular membrane; its insertion is not peculiar. 9. The coracobrachialis externus arises from the sternal end of the coracoid ; it has the usual insertion. 10. The coracobrachialis internus is rather smaller; it appears to have the ordinary relations. 11. The teres arises from nearly the whole of the ventral margin of the scapula; just before it narrows into the tendon of insertion, it gives off a small tendinous slip which joins the anconeus longus close to its origin : it is inserted into the inferior capitular fossa just anterior to the origin of a portion of the triceps. 12. The tensor patagii muscle (fig. 2) is formed of the combined brevis and longus, which are not to be distinguished at their origin ; it arises from the end of the clavicle and from a small portion of the scapula; the outer portion, which corresponds to the tensor patagii Fig. 2. Muscles and tendon of patagium of Scopus umbretta. T.p.l, Tensor patagii longus; T.p.br, tensor patagii brevis. longus (Tpl.) receives a slip, chiefly tendinous, from the pectoralis i j its tendon passes straight to the radial carpal bone, but about the middle of its course gives off a branch which joins the outer of the two tendons which form the tensor patagii brevis. The tendon of the tensor patagii brevis (T. p. br.) is double; at the junction of the belly of the muscle with the outer of the two tendons a small tendinous slip is given off to the crest of the humerus; the inner tendon receives a slip from the pectoral at a corresponding spot. The outer tendon |