Spinalis Capitis
Original Editor Oyemi Sillo
Lead Editors - Abbey Wright, Lucinda hampton, Oyemi Sillo, Kim Jackson and WikiSysop
Description[edit | edit source]
Spinalis Capitis (or Spinalis Colli) belongs to the medial column of the erector spinae (Sacrospinalis) group of muscles.[1] It is the most superior of the spinalis group of muscles with spinalis cervicis and thoracis lying inferiorly in the cervical and thoracic spine.
The spinalis muscles are a group of flat fascicles of varying lengths.[2]
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]
- ↑ Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/.
- ↑ 2.0 2.1 2.2 2.3 2.4 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/
