Rectus capitis posterior major muscle
Rectus capitis posterior major muscle | |
---|---|
Dorsal ramus of C1 (suboccipital nerve), sub-occipital nerve | |
Actions | Ipsilateral rotation of head and extension |
Identifiers | |
Latin | musculus rectus capitis posterior major |
TA98 | A04.2.02.004 |
TA2 | 2249 |
FMA | 32525 |
Anatomical terms of muscle] |
The rectus capitis posterior major (or rectus capitis posticus major[
Anatomy
The rectus capitis posterior major muscle is one of the suboccipital muscles. It forms the superomedial boundary of the suboccipital triangle.[1]
The muscle extends obliquely[2] superiolaterally from its inferior attachment to its superior attachment.[1][2] It becomes broader superiorly.[1]
Attachments
Its inferior attachment is (via a pointed tendon
Its superior attachment is at (the lateral portion of
Innervation
The muscle receives motor innervation from the suboccipital nerve (the posterior ramus of cervical spinal nerve C1).[2][1]
Relations
Superiorly, as the two muscles diverge laterally, they create between them a triangular space in which parts of the two
Actions/movements
The muscle extends the head and (acting together with the obliquus capitis inferior muscle[1]) ipsilaterally rotates the head.[1][2]
Function
Its main actions are to extend and rotate the atlanto-occipital joint.
Research
A soft tissue connection bridging from the rectus capitis posterior major to the cervical
See also
- Atlanto-occipital joint
- Rectus capitis lateralis
- Rectus capitis posterior minor muscle
- Rectus capitis anterior muscle
Additional images
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Position of rectus capitis posterior major muscle (shown in red).
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Rectus capitis posterior major muscle.
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Occipital bone. Outer surface.
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Rectus capitis posterior major's relationship to other suboccipital muscles.
References
This article incorporates text in the public domain from page 401 of the 20th edition of Gray's Anatomy (1918)
- ^ OCLC 1201341621.)
{{cite book}}
: CS1 maint: location missing publisher (link - ^ ISBN 978-0-7295-3752-0.
- S2CID 31560001.
External links
- PTCentral
- Anatomy photo:01:10-0102 at the SUNY Downstate Medical Center
- Anatomy figure: 01:07-04 at Human Anatomy Online, SUNY Downstate Medical Center