1. The occipital bone articulates with the atlas near the foramen magnum . 2. The foramen magnum migrated under the skull and more anterior. 3. The foramen magnum is much larger than the occipital condyle. 4. The occipital condyle is wider than the foramen magnum . 5. In most higher vertebrates, the foramen magnum is surrounded by a ring of four bones. 6. It is smooth and subtriangular, its apex directed posteriorly and it ends at the foramen magnum . 7. Diseases associated with mutation in the RICTOR gene include foramen magnum meningioma, syringomyelia, and batman. 8. Other uncommon locations are the lateral ventricle, foramen magnum , and the orbit / optic nerve sheath. 9. The next day he noticed another picularly the foramen magnum was at the bottom of the skull indicating bipedalism. 10. The spinal cord and the brain stem are joined at the base of the cranium at the foramen magnum .
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