Cervical vertebra, second definition - medical term
The second cervical vertebra is called the
axis. It is so-named because the uppermost cervical vertebra (called the atlas)
rotates about the odontoid process of the second cervical vertebra. The joint between
the axis and atlas is a pivot type of joint. It allows the head turn.
T he Latin word "axis" means axle or pole. The axis bone serves as the axle about
which the atlas (and the head) turn.
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