Vertebral Column The leadership instinct you are born

Vertebral Column The leadership instinct you are born with is the backbone. You develop the funny bone and the wishbone that go with it.

Divisions n n n Cervical (7) Thorasic (12) Lumbar (5) Sacrum (5 fused) Coccyx (4 fused)

Cervical Vertebrae n C 1 – Atlas ¡ ¡ Supports head (kidney shaped facets that support occipital condyles) No body, no spinous processes Facet that articulates with dens Facet that articulates with occipital condyle

Cervical Vertebrae cont. n C 2 – Axis ¡ Tooth-like dens projects upward and lies in ring of atlas n As head turns, atlas pivots around dens Spinous process

Cervical Vertebrae cont. n C 3 – C 7 ¡ ¡ Body, spinous process (some bifid), transverse process transverse foramen – passageway for arteries leading to brain

Cervical Vertebrae cont. Spinous process (bifid) Vertebral Foramen Lamina Superior articular facet Body Transverse Foramen Transverse process

Thoracic Vertebrae n n n T 1 -T 12 Larger than cervical vertebrae Long pointed spinous process, facets on sides of body to articulate with rib

Thoracic Vertebrae cont. Spinous process Lamina Transverse process Facet that articulates with rib tubercule Superior articular facet Pedicle Body Vertebral Foramen Facet that articulates with rib head

Lumbar Vertebrae n n L 1 -L 5 Adapted with larger and stronger bodies to support more weight Spinous process Lamina Pedicle Body Superior articulating process Transverse process Vertebral Foramen

Sacrum n n 5 fused vertebrae, base of V. C. Spinous processes form tubercules, dorsal sacral foramen, sacral canal Tubercle Dorsal spinal foramen

Coccyx n n Lowest part of V. C. 4 fused vertebrae Tubercle Dorsal spinal foramen