spinalis muscles
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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
Wikidata facts
- Part of
- erector spinae muscles
- Image
- Spinalis.png
Show 2 more facts
- innervated by
- posterior ramus of spinal nerve
- antagonist muscle
- rectus abdominis muscle
Sources (3)
via Wikidata · CC0
~2 min read
Encyclopedic overview
6 sectionsContents
- Spinalis dorsi
- Spinalis cervicis
- Spinalis capitis
- See also
- References
- External links
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.
Excerpted from Wikipedia’s “spinalis muscles” article, available under the CC BY-SA 4.0 licence.