Obliquus Capitis Superior

Original Editor - Oyemi Sillo

Top Contributors - Oyemi Sillo, Richard Benes, Daniele Barilla and Evan Thomas

Description

The obliquus capitis superior is a member of the suboccipital group of muscles along with obliquus capitis inferior, rectus capitis posterior major and rectus capitis posterior minor. It is narrow below, wide and expanded above, and is lateral to the semispinalis capitis. It forms the superolateral border of the suboccipital triangle.[1]


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Anatomy

The obliquus capitis superior is located laterally in the suboccipital compartment.

Origin

Superior surface of the transverse process of the atlas (c1)[2]

Insertion

Between the superior and inferior nuchal lines of the occipital bone[2]

Nerve Supply

Suboccipital nerve or dorsal ramus of cervical spinal nerve (c1)[3]

Blood Supply

The muscle receives its blood supply from the vertebral artery and the deep descending branch of the occipital artery.[3]

Function

Is a postural muscle that monitors the position of the head. [3]

Actions

Bilaterally, they extend the head; unilaterally, they laterally flex the the head to the same side as the muscle.[2]

Functional contributions

The actions of trapezius, sternocleidomastoid and other larger muscles that move the head are refined by the relatively small suboccipital triangle muscles.

Pathology/Injury

Physiotherapy Techniques

Recent Related Research (from Pubmed)

References

  1. Henry Gray: Anatomy of the Human Body [monograph online]. Philadelphia: Lea & Febiger; 1918 [cited 2015 Mar 30]. Available from: Bartleby; New York: 2000. fckLRhttp://www.bartleby.com/107/116.html
  2. 2.0 2.1 2.2 Wheeless III, CR. Obliquus capitis superior [Internet] 2011 [cited 2015 Mar 30]. Available from: http://www.wheelessonline.com/ortho/obliquus_capitis_superior_1
  3. 3.0 3.1 3.2 Obliquus capitis superior [Internet]. 2015 [cited 2015 Mar 30]. Available from: http://www.anatomyexpert.com/structure_detail/5212/