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The cervical vertebrae, particularly C1 (atlas) and C2 (axis), are the most mobile and delicate vertebrae in the spine. They allow for a wide range of motion, including rotation, flexion, and extension of the neck. Their unique anatomical structures, including the absence of a vertebral body in C1 and the odontoid process in C2, contribute to their mobility but also make them more susceptible to injury.

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