From the case:
Second cervical vertebrae (Gray's illustration)
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Diagrams of Second cervical vertebra, epistropheus, or axis, from above and the side.
Case Discussion
License: Original diagram reproduced from Gray's Anatomy of the Human Body 20th ed., published in 1918 and therefore has lapsed into the public domain.
Images retrieved from (https://www.bartleby.com/107/21.html).
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