. Bulletin - United States National Museum. Science. 48 NATIONAL MUSEUM BULLETIN 2 73 female. In the other male it takes place on ribs 2, 3, and 4 on the right side, but 3, 4, and 5 on the left. Sirena (1871) claims that the costal ending includes all five first ribs and does not describe an origin from C 1. In other respects his information coincides with mine but he refers to the muscle as m. scalenus posticus. Nerve supply: Branches from the anterior rami of C III to VI. M. scalenus medius accesorius (fig. 16): This triangular muscle is attached by its apex to the tip of the transverse
. Bulletin - United States National Museum. Science. 48 NATIONAL MUSEUM BULLETIN 2 73 female. In the other male it takes place on ribs 2, 3, and 4 on the right side, but 3, 4, and 5 on the left. Sirena (1871) claims that the costal ending includes all five first ribs and does not describe an origin from C 1. In other respects his information coincides with mine but he refers to the muscle as m. scalenus posticus. Nerve supply: Branches from the anterior rami of C III to VI. M. scalenus medius accesorius (fig. 16): This triangular muscle is attached by its apex to the tip of the transverse process of C 7. Its strong fleshy fibers radiate out toward the upper surface of the first rib where they are inserted bet\\een the sulcus subclavius (this insertion is not marked in the bone) and the angle. The accesorius. Figure 17.—Lateral view of the trunk and neck (1, m. scalenus brevis posterior; 2, m. scale- nus medius; 3, m. rectus abdominis; 4, m. obiiquus cxternus abdominis; 5, fascia thoraco- lumbalis; 6, m. scrratus posterior inferior; 7, m. serratus anterior, pars caudalis; 8, m. subscapularis; 9, m. scrratus anterior, pars cranialis; 10, ni. atlantoscapularis Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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