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  2. Foramen magnum - Wikipedia

    en.wikipedia.org/wiki/Foramen_magnum

    The opisthion is the midpoint on the posterior margin of the foramen magnum. The basion is located at the midpoint on the anterior margin of the foramen magnum. The alar ligament , which is attached on each side to the tubercle of occipital condyle , divides the foramen magnum into an anterior smaller compartment and a posterior larger compartment.

  3. Occipital bone - Wikipedia

    en.wikipedia.org/wiki/Occipital_bone

    The basion is the most anterior point of the opening and the opisthion is the point on the opposite posterior part. The basion lines up with the dens. Foramen magnum

  4. Basilar part of occipital bone - Wikipedia

    en.wikipedia.org/wiki/Basilar_part_of_occipital_bone

    On its lower surface, about 1 cm. in front of the foramen magnum, is the pharyngeal tubercle which gives attachment to the fibrous raphe of the pharynx.. On either side of the middle line the longus capitis and rectus capitis anterior are inserted, and immediately in front of the foramen magnum the anterior atlantooccipital membrane is attached.

  5. Atlanto-occipital dislocation - Wikipedia

    en.wikipedia.org/wiki/Atlanto-occipital_dislocation

    The distances between the dens and surrounding structures are also key features that can suggest the diagnosis, with the normal distance between the dens and basion (i.e., dens–basion interval; BDI) measuring less than 9 mm on CT, and the distance between the atlas and dens (i.e., atlas–dens interval; ADI) measuring less than 3 mm on CT, although this can be increased in cases of ...

  6. Cephalometric analysis - Wikipedia

    en.wikipedia.org/wiki/Cephalometric_analysis

    Cephalometric analysis depends on cephalometric radiography to study relationships between bony and soft tissue landmarks and can be used to diagnose facial growth abnormalities prior to treatment, in the middle of treatment to evaluate progress, or at the conclusion of treatment to ascertain that the goals of treatment have been met. [5]

  7. Clivus (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Clivus_(anatomy)

    The clivus (/ ˈ k l aɪ v ə s /, [1] Latin for "slope") or Blumenbach clivus is a part of the occipital bone at the base of the skull, [2] extending anteriorly from the foramen magnum.

  8. Internal occipital crest - Wikipedia

    en.wikipedia.org/wiki/Internal_occipital_crest

    In the occipital bone, the lower division of the cruciate eminence is prominent, and is named the internal occipital crest; it bifurcates near the foramen magnum and gives attachment to the falx cerebelli; in the attached margin of this falx is the occipital sinus, which is sometimes duplicated.

  9. External occipital protuberance - Wikipedia

    en.wikipedia.org/wiki/External_occipital...

    Near the middle of the squamous part of occipital bone is the external occipital protuberance, the highest point of which is referred to as the inion.The inion is the most prominent projection of the protuberance which is located at the posterioinferior (rear lower) part of the human skull.