INBDE (Integrated National Board Dental Examination) Practice Exam

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What vertebrae allows the head to rotate?

  1. C1

  2. C2

  3. C3

  4. C4

The correct answer is: C2

The correct answer is B. C2, also known as the axis vertebra, allows the head to rotate. This vertebra is unique as it has a bony protuberance called the odontoid process or dens, which forms a pivot point with the atlas vertebra (C1), enabling rotational movement of the head. Option A, C1, articulates with the skull but does not have the specific anatomy that allows for rotation. Options C and D, C3 and C4, are not directly involved in the rotational movement of the head and neck.

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