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Definition of Atlantoaxial

Atlantoaxial: Pertaining to the first and second cervical vertebrae which meet at a joint called the atlantoaxial joint.

The uppermost cervical vertebra (the atlas) rotates about the odontoid process of the second cervical vertebra (the axis). The joint between the axis and atlas is a pivot type of joint that allows the head turn.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012

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