Axial Vertebrae
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Axial Vertebrae

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Presentation of the Vertebral Column of the Axial Skeleton.

Presentation of the Vertebral Column of the Axial Skeleton.

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Axial Vertebrae Axial Vertebrae Presentation Transcript

  • Axial Skeleton
    The Vertebral Column
  • The Vertebral Column
    Extends from skull (supports the skull) to the pelvis (distributes weight to lower limbs)
    Five sections: cervical, thoracic, lumbar, sacrum, coccyx
    Born with 33 vertebrae, but nine fuse into two bones (sacrum and coccyx)
    Vertebrae separated by intervertebral discs
  • The Vertebral Column – VertebraeStructure
    Body/Centrum – disc-like part facing anteriorly
    Vertebral arch – formed by joining of all posterior extensions of vertebra
    Vertebral foramen – opening which spinal cord passes
    Transverse processes – two lateral projections from arch
    Spinous process – projection from posterior of arch
    Articular processes – superior and inferior projections lateral to foramen that articulate with above vertebra
    View slide
  • The Vertebral Column – Vertebrae Structure
    View slide
  • The Vertebral Column – Cervical Vertebrae
    7 vertebrae (identified as C1 to C7)
    First two vertebrae are Atlas (C1) and Axis (C2)
    Allow for the movement/rotation of skull
    Do not have a body
    Atlas articulates with the occipital condyles of the skull
    C3 through C7 are remaining cervical vertebrae
    Smallest vertebrae
    Contain transverse foramen
    Spinous processes usually split in middle
  • The Vertebral Column – Cervical Vertebrae
  • The Vertebral Column – Thoracic Vertebrae
    12 vertebrae (identified as T1 to T12)
    Connected with ribs
    Typical shape, slightly modified for ribs
    Includes costal facets to articulate with ribs in posterior
    Spinous process long, pointed down
  • The Vertebral Column – Thoracic Vertebrae
  • The Vertebral Column – Lumbar Vertebrae
    5 vertebrae (identified as L1 to L5)
    Bulkier shape
    Hatchet-shaped spinous processes
    Receives most of stress on vertebral column
  • The Vertebral Column – Lumbar Vertebrae
  • The Vertebral Column – Sacrum and Coccyx
    Sacrum is inferior to the L5 vertebra and superior to the coccyx
    Formed from the fusion of five vertebrae
    Alae are winglike projections that articulate laterally with the hip bones
    Forms posterior wall of pelvis
    Includes median sacral crest and dorsal sacral foramina
    Coccyx is inferior to sacrum
    Formed from fusion of three to five tiny vertebrae
    Commonly called the “tailbone”
  • The Vertebral Column – Sacrum and Coccyx