Spinalis

Spinalis

Muscle infobox
Name = PAGENAME
Latin = musculus spinalis
GraySubject = 115
GrayPage = 399


Caption = Deep muscles of the back. (Spinalis dorsi visible at center. Other spinalis muscles not visible.)


Caption2 =
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.
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
MeshName =
MeshNumber =
DorlandsPre = m_22
DorlandsSuf = 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.

pinalis 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.

pinalis 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.

pinalis capitis

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

ee also

* Semispinalis muscle
* Erector spinae
* Longissimus
* Iliocostalis

External links

* - "Intrinsic muscles of the back."
*
*
* [http://www.ithaca.edu/faculty/lahr/LE2000/Back/FinishedPics/JPEGs/ErectorsFar.jpgDissection at ithaca.edu]


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Look at other dictionaries:

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  • Spinālis — (lat.), was auf das Rückgrat Bezug hat, daher Medulla s., das Rückenmark; Spinalkrankheiten. die Krankheiten des Rückenmarks …   Meyers Großes Konversations-Lexikon

  • spinalis — SYN: spinal. [L.] * * * spinalis see MEDULLA SPINALIS spi·na·lis spī nā ləs, spi na lis n, pl spi·na·les (.)lēz the most medial division of the sacrospinalis situated next to the spinal column and acting to extend it or any of the three muscles… …   Medical dictionary

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  • spinalis capitis — spinalis cap·i·tis kap ət əs n a muscle that arises with, inserts with, and is intimately associated with the semispinalis capitis …   Medical dictionary

  • spinalis cervicis — spinalis cer·vi·cis sər və səs n an inconstant muscle that arises esp. from the spinous processes of the lower cervical and upper thoracic vertebrae and inserts esp. into the spinous process of the axis …   Medical dictionary

  • spinalis thoracis — spinalis tho·ra·cis thə rā səs n an upward continuation of the sacrospinalis that is situated medially to and blends with the longissimus thoracis, arises from the spinous processes of the first two lumbar and last two thoracic vertebrae, and… …   Medical dictionary

  • spinalis muscle — ▪ anatomy       any of the deep muscles of the back near the vertebral column that, as part of the erector spinae (sacrospinalis) muscle group, assist in extension (e.g., bending backward), lateral flexion (bending to the side), and rotation of… …   Universalium

  • spinalis muscle — musculus spinalis …   Medical dictionary

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