The splenius capitis is a deep muscle of the back. It is part of the spinotransversales muscle group and is located on the posterior aspect of the neck, covering the deep neck muscles. Attachments: Originates from the lower part of the ligamentum nuchae, and the spinous processes of C7 – T3/T4 vertebrae. The fibres attach to the mastoid process and the occipital bone of the skull. Actions: Rotate head to the same side. Innervation: Posterior rami of spinal nerves C3 and C4. Blood Supply: Muscular branches of the occipital artery from the external carotid artery. By TeachMeSeries Ltd (2025) Fig 1The splenius muscles, located with the superficial layer of intrinsic back muscles. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article