The Splenius Capitis Muscle of a Male as Seen from the Posterior

Description

Arising from the inferior half of the ligamentum nuchae and the spinous processes of C7 to T3, the splenius capitis fans superolaterally toward its insertion on the mastoid process of the temporal bone and the lateral third of the superior nuchal line. From a posterior perspective, its broad belly sits deep to trapezius and sternocleidomastoid, forming a recognizable oblique strap on either side of the midline. Medially it approaches the spinous processes and nuchal ligament, while laterally it borders the posterior cervical triangle and overlaps the deeper semispinalis capitis closer to the midline. Fibers converge superiorly near the mastoid. Clear landmarks. Clinically, this view maps directly onto a common source of occipital and upper cervical pain: splenius capitis trigger points can refer pain to the vertex and behind the eye, and tenderness is often localized near the mastoid insertion and along the superior nuchal line. The layer relationship with semispinalis capitis matters during posterior neck dissections and in targeted injections, because the greater occipital nerve typically emerges inferior to the obliquus capitis inferior and then courses superiorly through semispinalis and trapezius, so confusing layers can misplace a block. Rotational strain injuries often involve this muscle during whiplash and sustained head turn postures. Use this artwork in gross anatomy labs to teach posterior cervical musculature layering, in physical medicine and rehabilitation texts describing cervicogenic headache patterns, or in procedural guides that discuss posterior neck palpation and injection corridors near the mastoid and superior nuchal line. It also fits neurosurgical and ENT reference material when orienting posterior approaches around the mastoid region and upper cervical spine. Anatomical accuracy verified by SciePro's Medical Advisory Board.