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The Vertebral Column

The Vertebral Column. Consists of 33 vertebrae: - 24 separate vertebrae - 8-10 fused vertebrae Each individual vertebrae is separated by intervertebral discs. Divisions of the Vertebral Column. Cervical (neck) – 7 vertebrae Thoracic (chest) – 12 vertebrae

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The Vertebral Column

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  1. The Vertebral Column

  2. Consists of 33 vertebrae: - 24 separate vertebrae - 8-10 fused vertebrae Each individual vertebrae is separated by intervertebral discs

  3. Divisions of the Vertebral Column • Cervical (neck) – 7 vertebrae • Thoracic (chest) – 12 vertebrae • Lumbar (low back) – 5 vertebrae • Sacrum – 5 fused vertebrae • Coccyx (tailbone) – 3-5 fused

  4. 4 Normal Curvatures: • Cervical • Thoracic • Lumbar • Sacral

  5. Curves in the fetus? • Only one – concave anteriorly • Cervical develops at 3-4 months • Lumbar develops at about 1 year

  6. Abnormal Vertebral Curves: • Kyphosis: An increased roundness of the thoracic curve “hunchback”

  7. Lordosis: Increased lumbar curvature pregnancy and “potbellies”

  8. Scoliosis: Abnormal lateral curvature

  9. Atlas – 1st cervical vertebrae Supports the head Axis – 2nd cervical vertebrae Has a process that projects into the ring of the atlas The Cervical Vertebrae

  10. Ribs – 12 pairs - 7 upper connect to vertebrae and sternum “true” ribs - 5 lower do not connect directly to the sternum “false” ribs The Thoracic CageProtects the heart and lungs

  11. Sternum - 3 parts: 1. Manubrium 2. Body 3. Xiphoid process

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