The rectus capitis posterior major is a suboccipital muscle of the neck. It is the largest of the rectus capitis muscles and is located laterally to the rectus capitis posterior minor.
- Attachments: Originates from the spinous process of the C2 vertebrae (axis) and inserts into the lateral part of the inferior nuchal line of the occipital bone.
- 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.