EXCI 253 Study Guide - Final Guide: Nuchal Ligament, Supraspinous Ligament, Intramembranous Ossification
11 Apr 2018
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Document Summary
Skull bones developed through intramembranous ossification. Vertebral column c7 + t12 + s5 + co4 = 33 vertebrae = 26 bones. Intervertebral disc (fibrocartilage) 24 in the body. Cervical vertebrae = transverse foramina only in c"s. Thoracic vertebrae = facets on t"s to articulate with ribs (cid:523)ribs attach to t"s(cid:524) Sacrum: 5 fused vertebrae, median sacral crest fusion of spinal processes, sacral foramen, sacral hiatus (s5) Sacroiliac joint: upper portion = fibrous, lower portion = synovial, formed by ileum and sacrum. High water content at birth loss of water as aging progress. Height change on daily basis regular height is gained back nightly through osmosis. Spondylosis = narrowing of the disc space permanently. Nucleus pulposus functions: acts as a shock absorption mechanism, equalizes stress, important in the exchange of fluid between the disc and capillaries in vertebral column, the axis of movement between two adjacent vertebrae runs vertically through it.
