. Bulletin - United States National Museum. Science. MUSCULAR SYSTEM OF THE RED HOWLING MONKEY 101 border of the coracohiimeral ligament. Its lateral margin is covered by the medial bundles of m. pectoralis abdominis. These two muscles are closely joined by connective tissue, but still clearly differentiated from each other. Sirena (1871) thought that they formed a single pectoralis minor, but Campbell (1937) was able to identify them separately in Alouatta palliata. Nerve supply: The medial pectoral nerve with contributions from C VI and VII or VIII (fig. 26).. Figure 31.—Ventral view of the
. Bulletin - United States National Museum. Science. MUSCULAR SYSTEM OF THE RED HOWLING MONKEY 101 border of the coracohiimeral ligament. Its lateral margin is covered by the medial bundles of m. pectoralis abdominis. These two muscles are closely joined by connective tissue, but still clearly differentiated from each other. Sirena (1871) thought that they formed a single pectoralis minor, but Campbell (1937) was able to identify them separately in Alouatta palliata. Nerve supply: The medial pectoral nerve with contributions from C VI and VII or VIII (fig. 26).. Figure 31.—Ventral view of the thorax and shoulder (1, m. pectoralis minor; 2, m. pecto- ralis abdominalis; 3, m. biceps brachii; 4, m. obliquus externus abdominis; 5, m. brachialis; 6, m. pectoralis major; 7, m. deltoideus; 8, m. sternocleidomastoideus). M. jjectoralis abdominalis: This is also an elongated muscle broader at its costal than at its humeral end. It arises by fleshy fibers from the rectus sheath in front of approximately the sixth intercostal space and cartilage. This origin is higher in the female. The ventrally com- pressed belly reaches the shoulder where it changes into a progres-. 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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