spinalis muscles

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.

Key facts

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

via Wikipedia infobox

Article

6 sections

Contents

Spinalis dorsi
Spinalis cervicis
Spinalis capitis
See also
References
External links

==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.