Flexion - Anterior portion of Disc gets compressed, nucleus pulposus moves posteriorly , Extension - Posterior portion of Disc gets compressed, nucleus pulposus moves Anteriorly , Side bending Right with Flexion - nucleus pulposus moves Left and posteriorly, Side Bending Left with Extension - Nucleus pulposus moves Right and Anterior , Neutral Side Bending - minimal adjustment, Nucleus Pulposus stays centered,

disc changes with movement

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