KIN 3309 Lecture Notes - Lecture 8: Brachial Plexus, Medulla Oblongata, Spinal Stenosis
15 Feb 2017
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Document Summary
Vertebral column: provides rigid support/flexibility, 33 vertebrae. Vertebra prominens c7: can be palpated on the back of the neck. Damage can result in death, paralysis, respiratory failure (c3 and above) T11-t12 injuries: paraplegia, lack of bowel/bladder control, sexual function, reduced ability to control the trunk and abdominal muscles. Injuries may cause: paraplegia, lack of bowel/bladder control, sexual function, may have some ambulatory capabilities. Fused vertebrae: protects the spinal cord, 4 curves to facilitate support. S-shaped spine acts like an elastic rod. When slouching ligaments/joint capsules maintain posture: sitting. Unsupported sitting is more strenuous on the spine. Lumbar lordosis is reduced, upper body center of gravity shifts forward. Lumbar load is reduced in supported sitting, especially with support and a reclined back rest. Spinal cord: starts at medulla oblongata, ends at l1-l2, cervical enlargement brachial plexus, lumbar enlargement cauda equine, lumbosacral plexes. Motion segments: a functional unit is 2 adjacent vertebrae and the disc between.
