Rectus Capitis Posterior Major: The rectus capitis posterior major is the larger of the rectus capitis muscles. It is located laterally to the rectus capitis posterior minor. It is also known as the Greater Posterior Rectus Capitis and comprises the posterosuperior boarder of the suboccipital triangle.
Origin: Tip of the spinous process of the axis (C2).
Insertion: It inserts into the lateral part of the inferior nuchal line of the occipital bone.
Function: Extension and rotation of the head.
Nerve Supply: Suboccipital nerve (posterior ramus of C1).
Blood Supply: Rectus Capitis Posterior Major receive blood from the Vertebral artery and the deep descending branch of the occipital artery.
Neck Muscles
Neck Muscles: Origin, Insertion, Action & Nerve Supply