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Show 784 MR. ST. GEORGE MIVART ON THE [Julie 27, pronator teres. It is inserted into the carpal bone, which articulates with the radius, and also by a small tendon running on (figs. 6 & 1 2) into the radial side of the metacarpal of the pollex. Fig. 11. Deep muscles of extensor surface of right forearm. E. C. Extensor communis digitorum. E. C. JJ. Origin of extensor carpi ulnaris and common insertion of extensor and flexor carpi ulnaris. E. M. P. Extensor ossis metacarpi poliicis. S. L. Supinator longus. P. Q. Pronator quadratus. Fig. 12. Deep muscles of flexor surface of right forearm, the fiexor carpi radialis, flexor carpi ulnaris, and flexor profundus digitorum being cut and reflected. B. Biceps. F. C. S. Flexor carpi radialis. F. C. JJ. Flexor carpi ulnaris. F.P.B. Flexor profundus digitorum. P. A. Pronator accessorius. P. Q. Pronator quadratus. P. T. Pronator teres. £. A. Supinator accessorius. S. L. Supinator longus. Pronator accessorius (fig. 12, P. A.). A muscle I so name provisionally, arises from the anterior surface of the internal condyle, immediately beneath the humeral origin of the flexor profundus digitorum. It is inserted into the radius between the insertion of the pronator teres and that of the pronator quadratus. |