Spinalis

Jump to: navigation, search
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
Insertion: spinous process
Artery: lateral sacral artery
Nerve: posterior branch of spinal nerve
Action:
Antagonist: Rectus abdominis muscle
Dorlands/Elsevier m_22/12550873

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.

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.

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.

Spinalis capitis

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

See also

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

de:Musculus spinalis sv:Spinalis


Linked-in.jpg