Cervical Spine Movement Flexion Extension rheumatologist art. Shows the cervical skeleton during flexion-extension in the lateral and posterior views, then repeated with facet joint capsules, discs and nerve roots added. Finishes with a close-up of the C6 nerve root during flexion-extension in the lateral view. Visit http://www.medilaw.tv for more information. Cervical Spine Movement Flexion Extension rheumatologist art.