Obliquus capitis muscle

Obliquus capitis superior and obliquus capitis inferior muscles (shown in red). Image from Gray's Anatomy.

The Obliquus capitis muscle is a small muscle located in the upper part of the neck, specifically in the posterior suboccipital triangle. It is divided into two parts: the Obliquus capitis superior and the Obliquus capitis inferior.

Structure

The Obliquus capitis superior originates from the transverse process of the atlas and inserts into the occipital bone. It is responsible for extension and lateral bending of the head.

The Obliquus capitis inferior originates from the spinous process of the axis and inserts into the transverse process of the atlas. It is responsible for rotation of the head.

Function

The obliquus capitis muscles are part of the suboccipital muscles group, which are responsible for the fine motor control of head movements. They contribute to the extension, lateral bending, and rotation of the head.

Clinical significance

Due to their location and function, the obliquus capitis muscles can be involved in various neck and head conditions, such as tension headaches, cervicogenic headaches, and whiplash injuries.

See also

• Suboccipital muscles
• Atlas (anatomy)
• Axis (anatomy)

References

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