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Rectus capitis posterior major

The rectus capitis posterior major (also rectus capitis posterior major muscle, latin: musculus rectus capitis posterior major) is one of the suboccipital muscles that acts at the atlanto-occipital joint.

Origin

The rectus capitis posterior major originates from the spinous process of the axis (C2).

Insertion

The rectus capitis posterior major inserts onto the inferior nuchal line on the external surface of the occipital bone.

Action

The main movements provided by the rectus capitis posterior major are ipsilateral rotation of the head and extension of the head.

Innervation

The rectus capitis posterior major is innervated by the posterior ramus of the 1st cervical spinal nerve (C1), also known as the suboccipital nerve.