. Bulletin - United States National Museum. Science. MUSCULAR SYSTEM OF THE RED HOWLING MONKEY 33 Superficial Oblique System It is represented by a single muscle, the splenius. M. splenius: This strong muscle originates from the ligamentum nuchae, between the spine of the axis and that of thoracic vertebra 1. Some of its fibers are often displaced laterally and arise directly from the nuchal fascia. The flattened and fleshy belly is trapezoid-shaped. Its short parallel side limits, with that of the muscle from the opposite side, a small triangular space over the occipital and suboccipital regi
. Bulletin - United States National Museum. Science. MUSCULAR SYSTEM OF THE RED HOWLING MONKEY 33 Superficial Oblique System It is represented by a single muscle, the splenius. M. splenius: This strong muscle originates from the ligamentum nuchae, between the spine of the axis and that of thoracic vertebra 1. Some of its fibers are often displaced laterally and arise directly from the nuchal fascia. The flattened and fleshy belly is trapezoid-shaped. Its short parallel side limits, with that of the muscle from the opposite side, a small triangular space over the occipital and suboccipital regions. Insertion takes place on the outer half of the superior nuchal line deep to the endings of m. rhomboideus and trapezius (fig. 5). There was no splenius cervicis. Sirena (1871) includes the first two or three thoracic vertebrae in the origin of the muscle and, more interesting, describes the fibers along its lateral margin as being tendinous and inserted on the transverse process of the atlas. HiU (1962) also mentions such a vertebral 0 tD Figure 11.—Section at the level of L4 showing arrangement of thoracolumbar fascia (1, anapophysis; 2, metapophysis; 3, m. spinalis; 4, m. longissimus; 5, aponeurosis sacro- spinalis and its septum or attached sheet; 6, thoracolumbar fascia; 7, m. iliocostalis; 8, m. obliquus externus abdominis; 9, m. obliquus internus abdominis; 10, m. transversus abdominis).. 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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