The splenius cervicis 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 spinous processes of T3 – T6 vertebrae. The fibres attach to the transverse processes of C1-3/4. Actions: Rotate head to the same side. Innervation: Posterior rami of the lower cervical spinal nerves Blood Supply: Transverse cervical artery and descending branch of occipital 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