Vertebral Column. Backbone consists of 26 vertebrae. Five vertebral regions. Cervical

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1 Vertebral Column Backbone consists of 26 vertebrae. Five vertebral regions Cervical vertebrae (7) in the neck. Thoracic vertebrae (12) in the thorax. Lumbar vertebrae (5) in the lower back. Sacrum (5, fused). Coccyx (4, fused). Cervical Thoracic Lumbar Sacrum Coccyx

2 Kyphosis Lordosis Scoliosis

3 Atlas (C1) Posterior tubercle Vertebral foramen Superior articular facet Transverse foramen Tubercle for transverse ligament Transverse process Facet for dens Anterior tubercle Atlas- ring of bone, superior facets for occipital condyles. Nodding movement signifies yes.

4 Axis (C2) Spinous process Lamina Vertebral foramen Transverse foramen Transverse process Superior articular facet Odontoid process (dens) Axis- dens or odontoid process is body of atlas. Pivotal movement signifies no.

5 Typical Cervical Vertebra Smaller bodies Larger spinal canal Transverse processes Shorter Transverse foramen for vertebral artery Spinous processes of C2 to C6 often bifid 1st and 2nd cervical vertebrae are unique Atlas & axis (C3-C7)

6 Typical Cervical Vertebra Spinous process (bifid) Lamina Vertebral foramen Transverse foramen Transverse process Inferior articular process Superior articular process Pedicle Body

7 Thoracic Vertebrae (T1-T12) Larger and stronger bodies Longer transverse & spinous processes Demifacets on body for head of rib Facets on transverse processes (T1-T10) for tubercle of rib

8 Thoracic Vertebra- superior view Spinous process Transverse process Lamina Vertebral foramen Facet for tubercle of rib Superior articular process Pedicle Superior demifacet for head of rib Body

9 Thoracic Vertebra- lateral view Superior notch Superior articular process Facet for tubercle of rib Superior demifacet for head of rib Body Spinous process Inferior articular process Inferior notch Inferior demifacet for head of rib

10 Lumbar Vertebrae Strongest & largest Short thick spinous & transverse processes

11 Typical Lumbar Vertebrasuperior view Spinous process Lamina Pedicle Superior articular process Transverse process Vertebral foramen Body

12 Typical Lumbar Vertebralateral view Superior articular process Transverse process Spinous process Superior notch Body Inferior notch Inferior articular process Pedicle

13 Sacrum

14 Sacrum- ventral view Lateral mass Body Superior articular process Promontory Anterior sacral foramen Apex of sacrum Coccyx

15 Sacrum- dorsal view Superior articular facet Intermediate sacral crest Neural canal Lateral mass Articular surface Posterior sacral foramen Lateral sacral crest Median sacral crest Hiatus Coccyx

16 Thorax Thorax contains 25 bones Bony cage flattened from front to back Sternum (breastbone) Ribs 1-7 are true ribs (vertebrosternal) 8-12 are false ribs (vertebrochondral) are floating Costal cartilage

17 Sternum Clavicular notch Manubrium Jugular notch First Second Costal facets Body Xiphoid process Third Fourth Fifth Sixth Seventh

18 Ribs Fracture at site of greatest curvature. Increase in length from ribs 1-7, thereafter decreasing Head and tubercle articulate with facets Body with costal groove containing nerve & blood vessels Intercostal spaces contain intercostal muscles

19 Rib Articular facet for a transverse process Tubercle Cranial border Head Articular facets for bodies of vertebrae Angle Costal groove Neck Body Caudal border Ventral extremity

20 Rib Articulation Tubercle articulates with transverse process Head articulates with vertebral bodies

21 Intervertebral Discs Positioned between adjacent vertebrae Absorb vertical shock Permit movements of the vertebral column Fibrocartilagenous ring with a pulpy center

22 Herniated (Slipped) Disc Protrusion of the nucleus pulposus Most commonly in lumbar region Pressure on spinal nerves causes pain Surgical removal of disc after laminectomy

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