Posterior Major Rectus Capitis Muscle, Gross Anatomy

Description

Positioned deep in the posterior upper neck, the rectus capitis posterior major runs from the spinous process of the axis (C2) superolaterally to its broad insertion on the lateral part of the inferior nuchal line of the occipital bone. Lateral landmarks such as the auricle help orient the skull base, while more superficial layers, typically including splenius capitis and semispinalis capitis, sit posterior and superficial to the suboccipital triangle. Medially, the paired rectus capitis posterior majors flank the midline nuchal ligament and occipital crest, forming a muscular corridor over the posterior atlanto-occipital region. Fiber direction is easy to read. This muscle matters because it anchors rotation and extension across the C1 to C2 to occiput complex, and its intimate relationship to the C1 dorsal ramus (suboccipital nerve) makes it a practical landmark during suboccipital dissection. Spasm or trigger points in the suboccipital group, including rectus capitis posterior major, commonly refer pain to the occiput and vertex and are discussed in the workup of cervicogenic headache and occipital neuralgia. For posterior approaches that expose the craniovertebral junction, the rectus capitis posterior major sits deep to the semispinalis capitis and near the vertebral artery groove on C1, so this view supports safe layer-by-layer orientation and avoidance of neurovascular injury. Use this plate in gross anatomy and kinesiology teaching when you need to contrast superficial posterior cervical muscles with the deeper suboccipital layer, and in clinical education materials covering headache referral patterns, C1 dorsal ramus anatomy, and posterior cervical injections. It also fits operative atlases describing posterior C1 to C2 exposure and suboccipital decompression, where consistent depiction of the inferior nuchal line and C2 spinous process helps readers keep their bearings. Anatomical accuracy verified by SciePro's Medical Advisory Board.