PHTY101 Lecture Notes - Lecture 8: Intervertebral Disc, Coronal Plane, Weight-Bearing
Document Summary
Topic 8: bones and joints of vertebral column. Facet- not horizontal or vertical but angled between the two. Ipsilateral coupling of lateral flexion and rotation in cervical spine- can"t have one movement without the other. Tilted anteriorly- allows large flexion and extension range. Cervical intervertebral discs: structurally very different from lumbar discs, nucleus pulposus: Disappears by 3rd decade- decreased weight bearing role: annulus fibrosis: Not composed of alternating layers of collagen fibres. Begins to develop horizontal fissures from 1st decade- increase to completely divide disc in half in may elderly people. Reflects decreased role of cervical z articular surfaces in protecting cervical intervertebral discs. Reflects large range of cervical spine movement. Synovial joints between cervical vertebral bodies lateral to intervertebral discs. Develop as annulus fibrosis degenerates to permit large range of cervical movements. Lateral flexion and rotation- coupled contralaterally: articular surfaces: Occipital condyles of skull: articular capsule: Anterior and posterior atlanto-occipital membranes- limit all movements.
