atlanto-occipital membrane

atlanto-occipital membrane [ăt-lăn′tō-ŏk-sĭp′ĭ-tl] n.

1. The fibrous layer extending from the anterior arch of the atlas to the anterior margin of the great foramen.
2. The fibrous membrane that attaches between the posterior arch of the atlas and the posterior margin of the great foramen.