Animal Chiropractic Module 3 – Cervical Practice Test

The listing 'posterior (C1-C2)' refers to the relationship between which two vertebrae?

Atlas and Axis Occiput and Atlas Axis and C2

Correct Answer:

Atlas and Axis

Explanation:

The first and second cervical vertebrae are being referenced, which are the atlas (C1) and the axis (C2). Their joint, the atlantoaxial joint, is the main pivot that allows the head to turn from side to side. The atlas sits on the axis and rotates around the dens (odontoid process) of the axis, enabling that rotation. The skull sits on the atlas at a different joint (atlanto-occipital), so that pair wouldn’t be describing the C1-C2 relationship. A pairing of axis with C2 would be the same vertebra, not a two-vertebra relationship.

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