The external vertebral venous plexuses travel inferiorly from this suboccipital region to drain into the brachiocephalic vein.
The suboccipital nerve also innervates rectus capitis posterior minor.
The muscle is innervated by the suboccipital nerve, the dorsal ramus of the first spinal nerve.
The suboccipital nerve also passes through this defect.
It supplies muscles of the suboccipital triangle, the rectus capitis posterior major, obliquus capitis superior, and obliquus capitis inferior.
Through the condylar canal, the occipital emissary vein connects to the venous system including the suboccipital venous plexus, occipital sinus and sigmoid sinus.
It lies within the suboccipital triangle along with the vertebral artery, where the artery enters the foramen magnum.
It ascends after emerging from below the suboccipital triangle beneath the obliquus capitis inferior muscle.
