Rectus Capitis Posterior Major

Original Editor - Evan Thomas

Lead Editors - Evan Thomas and Tarina van der Stockt  

Description

The fibers of this muscle skips C1 as it runs from C2 to the occiput, lateral to the rectus capitis posterior minor. It is also known as the Greater Posterior Rectus Capitis, and comprises the posterosuperior boarder of the suboccipital triangle.[1]

OCI_post_view
OCI_right_lateral_view

Origin

Tip of the spinous process of the axis (C2).[2]

Insertion

Lateral aspect of the inferior nuchal line of the occiput,[2] as well as to the bone inferior to this line.[1]

Nerve Supply

Suboccipital nerve or dorsal ramus of cervical spinal nerve (C1).[2]

Blood Supply

Vertebral artery and the deep descending branch of the occipital artery.[2]

Action

Ipsilateral rotation of the atlantoaxial joint.[3]

Function

Likely a postural muscle that monitors the position of the head.[2]

Trigger Point Referral Pattern[1]

OCI_RCPM_TrP_Refferal

References

  1. 1.0 1.1 1.2 Travell JG, Simons DG, Simons LS (1998). Travell and Simons' Myofascial Pain and Dysfunction: The Trigger Point Manual, Volume 1: Upper Half of Body (2nd ed). Baltimore, MD: Williams & Wilkins.
  2. 2.0 2.1 2.2 2.3 2.4 http://www.anatomyexpert.com/structure_detail/5210/
  3. Agur AMR, Dalley AF (2012). Grant's Atlas of Anatomy (13th ed). Philadelphia, PA: Lippincott Williams & Wilkins.