The semispinalis muscles are a group of three muscles belonging to the transversospinales. These are the semispinalis capitis, the semispinalis cervicis and the semispinalis thoracis.
Semispinalis muscles
Deep muscles of the back. Semispinalis muscles labelled and shown in red. Capitis uppermost, cervicis top centre left, thoracis centre right
The tendons, uniting, form a broad muscle, which passes upward, and is inserted between the superior and inferior nuchal lines of the occipital bone. It lies deep to the trapezius muscle and can be palpated as a firm round muscle mass just lateral to the cervical spinous processes.
The semispinalis cervicis (or semispinalis colli), arises by a series of tendinous and fleshy fibers from the transverse processes of the upper five or six thoracic vertebrae, and is inserted into the cervical spinous processes, from the axis to the fifth cervical vertebrae inclusive. The semispinalis cervicis is thicker than the semispinalis thoracis. The fasciculus connected with the axis is the largest, and is chiefly muscular in structure.
The semispinalis thoracis (or semispinalis dorsi) muscle consists of thin, narrow, fleshy fasciculi, interposed between tendons of considerable length. It arises by a series of small tendons from the transverse processes of the sixth to the tenth thoracic vertebrae, and is inserted, by tendons, into the spinous processes of the upper four thoracic and lower two cervical vertebrae.
The semispinalis muscles are innervated by the dorsal rami of the cervical spinal nerves.
semispinalis, muscles, semispinalis, muscles, group, three, muscles, belonging, transversospinales, these, semispinalis, capitis, semispinalis, cervicis, semispinalis, thoracis, deep, muscles, back, labelled, shown, capitis, uppermost, cervicis, centre, left, . The semispinalis muscles are a group of three muscles belonging to the transversospinales These are the semispinalis capitis the semispinalis cervicis and the semispinalis thoracis Semispinalis musclesDeep muscles of the back Semispinalis muscles labelled and shown in red Capitis uppermost cervicis top centre left thoracis centre rightDetailsNerveGreater occipital nerveIdentifiersLatinmusculi semispinalisTA98A04 3 02 206TA22280FMA22823Anatomical terms of muscle edit on Wikidata Contents 1 Location 2 See also 3 Additional images 4 References 5 External linksLocation editThe semispinalis capitis complexus is situated at the upper and back part of the neck deep to the splenius muscles and medial to the longissimus cervicis and longissimus capitis It arises by a series of tendons from the tips of the transverse processes of the upper six or seven thoracic and the seventh cervical vertebrae and from the articular processes of the three cervical vertebrae above this C4 C6 The tendons uniting form a broad muscle which passes upward and is inserted between the superior and inferior nuchal lines of the occipital bone It lies deep to the trapezius muscle and can be palpated as a firm round muscle mass just lateral to the cervical spinous processes The semispinalis cervicis or semispinalis colli arises by a series of tendinous and fleshy fibers from the transverse processes of the upper five or six thoracic vertebrae and is inserted into the cervical spinous processes from the axis to the fifth cervical vertebrae inclusive The semispinalis cervicis is thicker than the semispinalis thoracis The fasciculus connected with the axis is the largest and is chiefly muscular in structure The semispinalis thoracis or semispinalis dorsi muscle consists of thin narrow fleshy fasciculi interposed between tendons of considerable length It arises by a series of small tendons from the transverse processes of the sixth to the tenth thoracic vertebrae and is inserted by tendons into the spinous processes of the upper four thoracic and lower two cervical vertebrae The semispinalis muscles are innervated by the dorsal rami of the cervical spinal nerves See also editList of muscles of the human bodyAdditional images edit nbsp Occipital bone Outer surface nbsp Base of skull Inferior surface nbsp Semispinalis capitis muscle nbsp Section showing cervicis and fasciaReferences edit nbsp This article incorporates text in the public domain from the 20th edition of Gray s Anatomy 1918 External links editAnatomy figure 01 06 01 at Human Anatomy Online SUNY Downstate Medical Center Anatomy figure 24 01 01 at Human Anatomy Online SUNY Downstate Medical Center Semispinalis capitis 1 at the Duke University Health System s Orthopedics program lesson6musclesofback at The Anatomy Lesson by Wesley Norman Georgetown University Anatomy figure 01 06 01 at Human Anatomy Online SUNY Downstate Medical Center Image at ithaca edu Semispinalis thoracis at the Duke University Health System s Orthopedics program Cross section image pembody body8a Plastination Laboratory at the Medical University of Vienna Portal nbsp Anatomy Retrieved from https en wikipedia org w index php title Semispinalis muscles amp oldid 1220706527, wikipedia, wiki, book, books, library,
