ANP 1106 Lecture 5: ANP1106Lecture5Summary

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jacqueline Carnegie

Document Summary

Reaming 9 fuse to form coccyx and sacrum. 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, coccyx. Functions: weight bearing, anchor for muscles and ligaments, protections of the spinal cord. Strap-like, support column of bones to stay upright. Continuous bands down front and back of vertebral bodies from neck to sacrum. Broad anterior ligament is strongly attached to bony vertebrae and the discs, prevent hyperextension. Posterior ligament prevents hyperflexion and is relatively weak. Stretched as we bend forward and recoils when we resume an erect posture. Short ligaments connect each vertebra to those immediately above and below. Cushioning between bony vertebral bodies - shock absorbers, 25% length of vertebral column. Inner gelatinous nucleus pulposus acts like a runner ball giving the disc elasticity and compressibility. Anulus fibrosus surrounds nucleus pulposus, composed of collagen fibres superficially and fibrocartilage internally. Discs are thickest in lumbar and cervical regions.