Spinalis Thoracis
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Description[edit | edit source]
Spinalis Thoracis belongs to the medial column of the erector spinae (Sacrospinalis) group of muscles.
It is the most prominent and well-organised portion of the spinalis muscle with spinalis capitis and spinalis cervicis superiorly.[1] With its muscle fibres running superiorly.
Origin[edit | edit source]
Spinous processes of T11-L2.[1][2]
Insertion[edit | edit source]
Spinous processes of T2-T8.[2]
Nerve[edit | edit source]
Lateral branch of the posterior rami of spinal nerves
Artery[edit | edit source]
Posterior branch of posterior intercostal artery, deep cervical artery and muscular branches of vertebral artery.
Function[edit | edit source]
Spinalis thoracis works with the other spinalis and the greater erector spinae muscles: longissimus and iliocostalis to produce cervical extension as well as lateral flexion and rotation of the spine and head.
References[edit | edit source]
- ↑ 1.0 1.1 Spinalis muscle [Internet]. Kenhub. 2021 [cited 30 November 2021]. Available from: https://www.kenhub.com/en/library/anatomy/spinalis-muscle
- ↑ 2.0 2.1 Palastanga, N., & Soames, R. (2012). Anatomy and human movement (6th ed.). Edinburgh: Churchill Livingstone.
