From Surf Wiki (app.surf) — the open knowledge base

Spinalis

Portion of the erector spinae

Summary

Portion of the erector spinae

Field	Value
Name	Spinalis
Latin	musculus spinalis
Image	Spinalis.png
Caption	Deep muscles of the back (spinalis dorsi visible at center. Other spinalis muscles not visible).
Origin	Thoracis: Spinous process of upper lumbar and lower thoracic vertebrae.
Cervicis: nuchal ligament and spinous process of C7.
Insertion	Thoracis: Spinous process of upper thoracic vertebrae.
Cervicis: Spinous process of cervical vertebrae except atlas.
Action	Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column.
Blood	Lateral sacral artery
Nerve	Posterior branch of spinal nerve
Antagonist	Rectus abdominis muscle

Cervicis: nuchal ligament and spinous process of C7. Cervicis: Spinous process of cervical vertebrae except atlas. The spinalis is a portion of the erector spinae, a bundle of muscles and tendons, located nearest to the spine. It is divided into three parts: Spinalis dorsi, spinalis cervicis, and spinalis capitis.

Spinalis dorsi

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 vertebrae, the number varying from four to eight.

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

Spinalis cervicis

Spinalis cervicis, or spinalis colli, is an inconstant muscle, which arises from the lower part of the nuchal ligament, the spinous process of the seventh cervical, and sometimes from the spinous processes of the first and second thoracic vertebrae, and is inserted into the spinous process of the axis, and occasionally into the spinous processes of the two cervical vertebrae below it.

Spinalis capitis

Spinalis capitis (biventer cervicis) is usually inseparably connected with the semispinalis capitis.

Spinalis capitis is not well characterized in modern anatomy textbooks and atlases, and is often omitted from anatomical illustration. However, it can be identified as fibers that extend from the spinous processes of TV1 and CV7 to the cranium, often blending with semispinalis capitis

References

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

muscles-of-the-torso

Want to explore this topic further?

Ask Mako anything about Spinalis — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report