Median atlanto-occipital and atlantoaxial joints (Gray's illustration)
Diagnosis not applicable
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Anatomy of the C0/1 and C1/2 joints.
Case Discussion
Anatomy of the C0/1 and C1/2 joints.
Original diagram, reproduced from Gray's Anatomy 20th US edition which has now lapsed into the public domain (https://en.wikipedia.org/wiki/Anterior_atlantoaxial_ligament#/media/File:Gray308.png).