Rectus capitis posterior major

The rectus capitis posterior major muscle is a triangular-shaped short suboccipital muscle that connects the second cervical vertebra (axis; C2) with the occipital bone of the skull. Overall, it provides postural support for the head and acts at the atlanto-occipital joint and atlanto-axial joint. Moreover, it forms the superomedial border of the suboccipital triangle.