vertebral column
Post on 19-Jan-2016
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The Vertebral Column
Provides a column of support bearing weight of the head, neck, and trunkTransfers weight to the lower limbs of the appendicular skeletonProtects the spinal cordHelps maintain an upright body position
Vertebral column
26 bones24 VertebraeCervical (7)
Begins at neck and extends inferiorly to the trunk
Thoracic (12)superior portion of the backEach articulates with one or more ribs
Vertebral ColumnLumbar (5)
Inferior portion of the backThe 5th one articulates with the sacrum
Sacrum (1)- articulates with the coccyxCoccyx (1) tailboneThe sacrum and the Coccyx both originally start as
separate vertebrae that fuse together throughout puberty and into early adulthood
Spinal Curvature
There are 4 main curves in the spine (cervical, thoracic, lumbar, and sacral).Most of our weight is anterior to the vertebral column, the curves bring the weight back in line with the axis of the body so that the weight can be transferred to your hips and then the lower limbs
Vertebral Anatomy
Vertebral Body- transfers weight along axis of vertebral column, and are separated by intervertebral discs
Vertebral Arch- Forms the vertebral canal which encloses the spinal cord, spinous process projects posteriorly, you can feel this in your back
Vertebral Anatomy Cont.
Articular processes- allow muscles to attach to vertebra
Vertebral Regions
A capital letter is used to identify region, and a number is used to indicate position within the region (1 is most cranial or superior)C, T, L, S, Co indicate region
Cervical Vertebrae
Smallest, extend from occipital bone to the thorax
Body is small compared with the size of the the vertebral foramen
Atlas and Axis (C1 and C2)
Atlas C1- holds up the head, articulates with the occipital bone, which allows you to nod.
Axis C2- Articulates with C1, this fusion is called the dens, and it allows for a pivoting motion
Thoracic Vertebrae (12)
Distinct heart shaped body
Have a smaller vertebral foramen
Articulate with the ribs
Lumbar vertebrae
Largest of the vertebrae, smaller vertebral foramen
Bear most of the weight
Sacrum and Coccyx
Sacrum consists of 5 fused bones that fuse shortly after pubertyProtects the reproductive, digestive, and urinary organsCoccyx consists of 3-5 fused vertebrae that usually begin fusing by age 26Provides an attachment site for muscles
Feature Cervical Thoracic Lumbar
Location
Body
VertebralForamenSpinous Process
TransverseProcessFunctions
Picture
Use pg. 216 to complete the following table
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