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  2. 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., densbasion 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 ...

  3. Occipital bone - Wikipedia

    en.wikipedia.org/wiki/Occipital_bone

    The basion-dens line as seen on a radiograph is the distance between the basion and the top of the dens, used in the diagnosis of dissociation injuries. [4] Genetic disorders can cause a prominent occiput as found in Edwards syndrome, and Beckwith–Wiedemann syndrome. The identification of the location of the fetal occiput is important in ...

  4. Cranid - Wikipedia

    en.wikipedia.org/wiki/Cranid

    CranID is a free software program that utilizes multivariate linear discriminant analysis and nearest neighbor discriminant analysis in conjunction with 29 cranial measurements to assess the geographic origin, which can be used to infer the ancestry of an unknown cranium.

  5. 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.

  6. Equations for a falling body - Wikipedia

    en.wikipedia.org/wiki/Equations_for_a_falling_body

    A set of equations describing the trajectories of objects subject to a constant gravitational force under normal Earth-bound conditions.Assuming constant acceleration g due to Earth's gravity, Newton's law of universal gravitation simplifies to F = mg, where F is the force exerted on a mass m by the Earth's gravitational field of strength g.

  7. Foramen magnum - Wikipedia

    en.wikipedia.org/wiki/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.

  8. On the Sizes and Distances (Aristarchus) - Wikipedia

    en.wikipedia.org/wiki/On_the_Sizes_and_Distances...

    Aristarchus's 3rd century BCE calculations on the relative sizes of, from left, the Sun, Earth and Moon, from a 10th-century CE Greek copy. On the Sizes and Distances (of the Sun and Moon) (Ancient Greek: Περὶ μεγεθῶν καὶ ἀποστημάτων [ἡλίου καὶ σελήνης], romanized: Perì megethôn kaì apostēmátōn [hēlíou kaì selḗnēs]) is widely accepted ...

  9. Cephalometric analysis - Wikipedia

    en.wikipedia.org/wiki/Cephalometric_analysis

    Distance from lower incisor to NB line 4 mm U1-L1 (°) Upper incisor to lower incisor angle 130 degrees L1-Chin (mm) Also known as Holdaway Ratio. It states that chin prominence should be as far away as the farthest point of the lower incisor should be. An ideal distance is 2mm from Pogonion to NB line and L1 to NB line. 4mm Soft tissue: S Line