Spinalis
Deep muscles of the back. (Spinalis dorsi visible at center. Other spinalis muscles not visible.)
Latin	musculus spinalis
Gray's	subject #115 399
Origin	spinous process Thoracis: Upper lumbar and lower thoracic vertebrae. Cervicis: Ligamentum nuchae & spinous process of C7.
Insertion	spinous process Thoracis: SP of upper thoracic vertebrae. Cervicis: SP of cervical vertebrae except C1.
Artery	lateral sacral artery
Nerve	posterior branch of spinal nerve
Actions	Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column.
Antagonist	Rectus abdominis muscle

The spinalis is the portion of the erector spinae, a bundle of muscles and tendons, located nearest to the spine. It is divided into three parts.

Contents 1 Spinalis dorsi 2 Spinalis cervicis 3 Spinalis capitis 4 See also 5 External links

[edit] Spinalis dorsi

The Spinalis dorsi, the medial continuation of the Sacrospinalis, is scarcely separable as a distinct muscle.

It is situated at the medial side of the Longissimus dorsi, and is intimately blended with it; it arises by three or four tendons from the spinous processes of the first two lumbar and the last two thoracic vertebrae: these, uniting, form a small muscle which is inserted by separate tendons into the spinous processes of the upper thoracic vertebræ, the number varying from four to eight.

It is intimately united with the Semispinalis dorsi, situated beneath it.

[edit] Spinalis cervicis

The Spinalis cervicis (Spinalis colli) is an inconstant muscle, which arises from the lower part of the ligamentum nuchæ, the spinous process of the seventh cervical, and sometimes from the spinous processes of the first and second thoracic vertebræ, and is inserted into the spinosus process of the axis, and occasionally into the spinous processes of the two vertebræ below it.

[edit] Spinalis capitis

The Spinalis capitis (Biventer cervicis) is usually inseparably connected with the Semispinalis capitis.

[edit] See also

• Semispinalis muscle
• Erector spinae
• Longissimus
• Iliocostalis

[edit] External links

• SUNY Figs 01:06-04 - "Intrinsic muscles of the back."
• LUC spin
• spinalis+%28muscle%29 at eMedicine Dictionary
• Dissection at ithaca.edu

v • d • e List of muscles of torso (TA A04.3-5, GA 4.397) Back splenius (capitis, cervicis) · erector spinae (iliocostalis, longissimus, spinalis) · latissimus dorsi transversospinales: (semispinalis dorsi, semispinalis cervicis, semispinalis capitis, multifidus, rotatores) · interspinales · intertransversarii Vertebral column: trapezius · latissimus dorsi · rhomboid (major, minor) · levator scapulae fascia: Thoracolumbar fascia Thorax intercostales (external, internal, innermost) · subcostales · transversus thoracis · levatores costarum · serratus posterior (inferior, superior) · diaphragm Thoracic cavity: pectoralis major · pectoralis minor · subclavius · serratus anterior fascia: Pectoral fascia · Clavipectoral fascia Abdominopelvic Abdomen/ wall Anterior/ lateral Abdominal external oblique · Transversus abdominis/Conjoint tendon · Rectus sheath (rectus abdominis, pyramidalis) · Arcuate line · Tendinous intersection Cremaster · Abdominal internal oblique Fascia/abdominal fascia: panniculus adiposus (Fascia of Camper) · stratum membranosum (Fascia of Scarpa) · Transversalis fascia (Interfoveolar ligament) Linea alba · Linea semilunaris · Inguinal triangle Inguinal canal (Deep inguinal ring, Superficial inguinal ring, Intercrural fibers, Crura of superficial inguinal ring) Inguinal ligament (Pectineal ligament, Lacunar ligament, Reflected ligament) Posterior quadratus lumborum · psoas major/psoas minor · iliacus  · iliopsoas fascia (Iliac fascia/Iliopectineal arch) Pelvis levator ani (iliococcygeus, pubococcygeus, puborectalis) · coccygeus fascia/pelvic fascia visceral (Rectovaginal fascia, Rectoprostatic fascia) · parietal (Obturator fascia/Tendinous arch, Piriformis fascia) floor/diaphragm: Superior fascia of pelvic diaphragm (Pubovesical ligament, Puboprostatic ligament) · Inferior fascia of pelvic diaphragm Anococcygeal body

This muscle article is a stub. You can help Wikipedia by expanding it. v • d • e

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.