What is semispinalis?

semispinalis is a group of three muscles found in the human back: semispinalis capitis, semispinalis cervicis and semispinalis dorsi. Together extending from the base of the skull to the lower chest of the vertebra runs these muscles parallel to the spine. They are included among the muscles of Transverspineles, a group that consists of three muscles of semispinalis, multifidus and three rotator muscles: Rotatores Cervicis, Rotatores Toraracis and Rotatores Lumborum. Like other transversospinals muscles, the groups of semispinalis are responsible for extending and rotating the spine, although their individual actions are determined by their location. Rather than a single tendon, as well as many muscles in the body, it comes over several tendons. These start along the cross-processes or hips of projection, upper six or seven thoracic vertebrae and the lowest cervical vertebrae, C7, as well as on the joints of C4-C6. From there the tendons form the only muscle that rises along both sides of the vertebral column and connects to the occipital bone nand the underside of the skull. When the chapter is in the throat and attaches to the head, they act on the vertebrae that move their heads, stretch their heads up and slightly back and rotate their heads on the neck.

The three -product of the three is the semispinalis cervicis, which is shorter and narrower than the chapter. It consists of a fascication, muscle muscle fibers closed in the vagina connective tissue called perimysium. These fascicles come from the transverse processes of the highest five or six thoracic vertebrae and run only deeper than the chapter, which means that the uterine fibers are found under those of the chapter. They insert along the spin processes or back bone projections C2-C5, attaching to medium uterine turnover. This location dictates that cervicis acts on the cervical and upper thoracic spine and extends the vertebrae up.

It is immediately below the fascululus semispinalis cerviciss are the semispinalis dorsi, the narrowest of the three muscles. HerAchy comes from the transverse processes of the T6-T10 in the middle of the spine and inserts along six consecutive vertebrae: C6-C7 and T1-T4. These fibers act on the thoracic spine and spread the vertebrae up and rotate the columns on both sides.