EHS 160 Lecture Notes - Lecture 8: Intervertebral Disc, Ligamenta Flava, Scoliosis

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4 curvatures cervical, thoracic, lumbar, sacral cervical concave posteriorly thoracic convex posteriorly lumbar concave posteriorly sacral convex posteriorly acts as spring-like fashion to decrease pressure. Ligaments of vertebral column anterior longitudinal and posterior longitudinal ligaments anterior longitudinal tighter. Attaches to both vertebrae ( bone and discs) posterior longitudinal. Allows for greater flexure than hyperextension backwards ligamentum flavum ligaments b/w vertebrae. Allow for recoil at flexure intervertebral discs surrounded by fibrous ct - anulus fibrosus. Collagen fibers and gel if anulus fibrosus splits, nucleus pulposus can project onto spinal nerves. Exaggeration of lumbar curvature seen in pregnancy and obese. Back pain act to distribute weight evenly across foot. Talus is keystone of arch to the median metatarsals transverse. Across joints b/w tarsals and metatarsals lateral longitudinal from calcaneus. Joints/articulations junctions b/w bones classify joints based on structure fibrous joints. 1: cartilaginous joints, synovial joints classify joints based on function, synarthroses - immovable joints, amphiarthroses - slightly movable, diarthroses - freely move.

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