The suboccipital triangle is bounded superolaterally by:

Ref: BDC -194 Boundaries Superomedially: Rectus capitis posterior major muscle supplemented by the rectus capitis posterior minor. Superolaterally: Superior oblique muscle. Inferiorly: Inferior oblique muscle. Roof Medially: Dense fibrous tissue covered by the semispinalis capitis. Laterally: Longissimus capitis and occasionally the splenius capitis. Floor 1. Posterior arch of atlas. 2. Posterior atlanto-occipital membrane Contents 1. Third part of vertebral artery. 2. Dorsal ramus of nerve C1 – suboccipital nerve. 3. Suboccipital plexus of veins.