Obliquus Capitis Inferior

Written by Max Bidewell

Last updated January 30, 2023 • 4 Revisions

The obliquus capitis inferior is a suboccipital muscle of the neck. It is the only muscle within the suboccipital group which has no attachment to the cranium.

  • Attachments: Originates from the spinous process of the C2 vertebra and attaches onto the transverse process of C1.
  • Actions: Extension and rotation of the head.
  • Innervation: Suboccipital nerve (posterior ramus of C1)
  • Blood supply: Vertebral artery and deep descending branches of the occipital artery

Fig 1
The left occipital muscles, which lie underneath the deep muscles of the back.

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