The Axis (C2) is the second cervical vertebra, which plays a crucial role in the rotation of the head due to its unique structure featuring the odontoid process, or dens. This vertebra, along with the Atlas (C1), forms the atlanto-axial joint, allowing for pivotal head movements and providing stability to the cervical spine.

Axis (C2)

The Axis

second cervical vertebra

rotation of the head

unique structure

The odontoid process, also known as the dens, is a bony projection of the second cervical vertebra (C2) that plays a crucial role in the rotation of the head and neck. It acts as a pivot that allows the atlas (C1) and the skull to rotate around the axis, providing a significant range of motion for the head.

odontoid process

dens

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