Spinalis Capitis: Difference between revisions
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== Introduction == | |||
== | |||
[[File:Muscles of the cervical region intermediate muscles Primal.png|thumb|386x386px]] | [[File:Muscles of the cervical region intermediate muscles Primal.png|thumb|386x386px]] | ||
The erector spinae group is the intermediate layer of the intrinsic [[Back Muscles|muscles of the back]]. The erector spinae consists of three subgroups, with the group divisions occurring by location. | |||
# '''Spinalis subgroup''' is the most medial | |||
# Longissimus subgroup is between spinalis and iliocostalis | |||
# Iliocostalis subgroup is the most lateral<ref name=":1">Radiopedia Erector spinae group Available: https://radiopaedia.org/articles/erector-spinae-group?lang=us<nowiki/>(accessed 4.2.2022)</ref> | |||
It is known as spinalis capitis due to its attachments to the head (cranium).<ref name=":0" /> | Spinalis Capitis (or Spinalis Colli) is the most superior of the spinalis group of muscles with [[Spinalis Cervicis|spinalis cervicis]] and [[Spinalis Thoracis|spinalis thoracis]] lying inferiorly in the cervical and thoracic spine. It is not a truly separate muscle, when it exists it consists of occasional fibers from the semispinalis capitis, but with a different insertion<ref name=":1" />. It is known as spinalis capitis due to its attachments to the head (cranium).<ref name=":0">Spinalis muscle [Internet]. Kenhub. 2021 [cited 30 November 2021]. Available from: https://www.kenhub.com/en/library/anatomy/spinalis-muscle</ref> | ||
== Origin == | == Origin == | ||
Revision as of 02:00, 4 February 2022
Original Editor Oyemi Sillo
Lead Editors - Abbey Wright, Lucinda hampton, Kim Jackson, Oyemi Sillo and WikiSysop
Introduction[edit | edit source]
The erector spinae group is the intermediate layer of the intrinsic muscles of the back. The erector spinae consists of three subgroups, with the group divisions occurring by location.
- Spinalis subgroup is the most medial
- Longissimus subgroup is between spinalis and iliocostalis
- Iliocostalis subgroup is the most lateral[1]
Spinalis Capitis (or Spinalis Colli) is the most superior of the spinalis group of muscles with spinalis cervicis and spinalis thoracis lying inferiorly in the cervical and thoracic spine. It is not a truly separate muscle, when it exists it consists of occasional fibers from the semispinalis capitis, but with a different insertion[1]. It is known as spinalis capitis due to its attachments to the head (cranium).[2]
Origin[edit | edit source]
Spinous process of C7 -T1.[2]
Insertion[edit | edit source]
Near the midline between superior and inferior nuchal lines of occipital bone.
Nerve Supply[edit | edit source]
Lateral branch of the rami of cervical spinal nerves (C1 to C3). [2]
Blood Supply[edit | edit source]
Muscular branches of the vertebral artery via the subclavian and also from muscular branches of the occipital artery via the external carotid artery.[2]
Action[edit | edit source]
Bilaterally extends the cervical spine and head.
Unilaterally spinalis capitis laterally flexes and rotates the cervical spine and head to ipsilateral (same) side[3].
Function[edit | edit source]
Spinalis capitis works with the other spinalis and greater erector spinae muscles to produce cervical extension as well as lateral flexion and rotation of the spine and head.
References[edit | edit source]
- ↑ 1.0 1.1 Radiopedia Erector spinae group Available: https://radiopaedia.org/articles/erector-spinae-group?lang=us(accessed 4.2.2022)
- ↑ 2.0 2.1 2.2 2.3 Spinalis muscle [Internet]. Kenhub. 2021 [cited 30 November 2021]. Available from: https://www.kenhub.com/en/library/anatomy/spinalis-muscle
- ↑ Spinalis Cervicis : Wheeless' Textbook of Orthopaedics [Internet]. Wheeless' Textbook of Orthopaedics. 2021 [cited 30 November 2021]. Available from: https://www.wheelessonline.com/bones/spine/spinalis-cervicis/
