Splenius Capitis

Description

Posterior cervical anatomy is presented with the occipital bone superiorly, the cervical spinous processes descending to the upper thoracic spine, and the medial borders of the scapulae flanking the upper back. The splenius capitis is demonstrated as a broad, obliquely oriented sheet in the superficial posterior neck, arising from the nuchal ligament and spinous processes of C7 to T3 or T4 and coursing superolaterally. Its fibers converge toward the mastoid process of the temporal bone and the lateral third of the superior nuchal line, lying superficial to semispinalis capitis and medial to the posterior border of sternocleidomastoid at the upper neck. Bilateral symmetry and the muscle’s fan-shaped attachment are easy to appreciate. Clear depiction of the splenius capitis matters because it is a common pain generator in cervicogenic headache and posterior neck strain, and its oblique fiber direction explains the coupled actions of ipsilateral rotation and lateral flexion with head and neck extension. Palpation and trigger point referral patterns are often confused with deeper transversospinalis muscles, so separating splenius capitis from semispinalis capitis helps when teaching examination of the suboccipital region. It also frames posterior surgical approaches that traverse the midline raphe and nuchal ligament, where layered dissection determines exposure while limiting postoperative weakness. Use this asset in gross anatomy and kinesiology modules covering posterior cervical musculature, in rehabilitation texts illustrating neck extensor function and common strain patterns, or in clinical education materials for headache clinics and spine services discussing posterior neck myofascial pain. Anatomical accuracy verified by SciePro's Medical Advisory Board.