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.