Kin 3304 Test 2 Spinal Column.docx

Kin 3304 Test 2 Spinal Column.docx - Spinal column Composed...

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Spinal column Composed of 33 vertebrae (irregular bones) stacked in column, each separated by cartilaginous disc and jointed by ligaments and muscles Functions: Protects spinal cord Supports weight of body above pelvis Plays a role in posture and movement Maintains the brain over the body’s center of gravity Regions: 5 Cervical (7), Thoracic (12), Lumbar (5), Sacral (5), Coccygeal (4) 2 Anterior curves at the cervical and lumbar 2 posterior curves at the thoracic and sacrococcygeal Vertebrae Has a body (weight bearing component) 2 transverse processes 1 spinous process (attachment for ligaments and muscles) Vertebral foramen: passage for spinal cord and nerve roots Vertebral notch Intervertebral foramen: passage for nerve branches from the spinal cord Superior and inferior articulating processes with superior and inferior articulating facets. (superior articulation facet from lower vertebrae articulates with inferior articulating process of upper vertebrae.) Unique structures in vertebrae Cervical vertebrae Have Bifid (split) spinous process Foramen in each transverse process Blood vessel passage C1: The atlas Little body and 2 large articular facets for articulation with skull C2: Axis 2 large superior surfaces that articulates with the atlas C7 has a prominent spinous process Thoracic vertebrae
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