Disturbance of the normal anatomy can lead to imbalance and instability. When this will be left uncorrected, it may progress to significant deformations of the cervical spine.
The cervical spine is crucial for normal load distribution.
ANATOMY OF CERVICAL SPINES
The atlas(C1) and axis(C2) are specialized to allow a greater range of motion than normal vertebrae. They are responsible for the nodding and rotation movements of the head.The atlanto-occipital joint allows the head to nod up and down on the vertebral column. The dens acts as a pivot that allows the atlas and attached head to rotate on the axis, side to side..
The atlas and axis are important neurologically because the brain stem extends down to the axis.