| OCR Text |
Show 772 MR. ST. GEORGE MIVART ON THE [June 27, extend down to the junction of the vertebral ribs with the sternal ones. Fig. 3. n. c. Subvertebral muscles of right side. Q. L. Quadratus lumborum. R. C. Retrahentes costarum. Retrahentes costarum. A very remarkable muscular layer* (fig. 3, R. G), which is tendinous at its insertion and at the posterior part of its origin, but muscular elsewhere. It has a certain resemblance to the diaphragm, as it is internal to all the other body-muscles. It arises from the sides of the ventral surfaces of the bodies of nine vertebrae, beginning with the first dorsal. The muscular fibres proceed forwards and ventrad, and are inserted into the ribs of the seventh and eighth cervical vertebrae, and into the seven following ribs. The insertion of the aponeurosis is close to the origin of the fascia of the transversalis f. Pyramidalis (fig. 14, Pyi). This muscle is largely developed, and is placed beneath the rectus. It arises from the ligamentous arch extending back from the spine of the pubis; and its fibres ad- * The m. retrahentes costarum of Stannius (loc. cit. p. 103). t As Stannius remarks (loc. cit. note 4 to p. 103). |
