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18 Cards in this Set
- Front
- Back
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What are the four regions of the spine and how many vertebrae are in each section? |
Cervical- the top seven vertebrae (C1 – C7). The skull is often considered to be part of the spine, and is referred to as C0; C1 is called the Atlas; C2 is called the Axis;
Thoracic- the next twelve vertebrae (T1 – T12);
Lumbar- the final five “true” vertebrae (L1 – L5);
Sacrococcygeal- Nine fused vertebrae form the sacrum and the coccyx |
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Does the atlas have pedicles?
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The atlas does NOT have pedicles
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Does the atlas have a spinous process?
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The atlas does NOT have a spinous process
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Which vertebra acts as the pivot point for the rotation of the atlas?
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The axis acts as a pivot point for rotation for the atlas.
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The projection of bone from the body of the axis is called the __________.
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Odontoid Process
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What do the C2 to C6 vertebrae have that the C7 doesn’t?
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a bifid spinous processes |
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Which vertebra is called the vertebra prominens?
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C7 is referred to as the Vertebra Prominens |
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What shape are the thoracic vertebral bodies?
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Heart Shaped
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Describe the thoracic vertebral foramen as it pertains to space and shape
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The Vertebral Foramen is more round, as opposed to triangular, with less space for the spinal cord.
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Which vertebrae are the junctional vertebrae?
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The areas from C6 – T2 and T11 – L2 |
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What makes the thoracic spine stiff and stable?
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The presence of the rib cage and the position of the spinous processes make the thoracic spine stiff and stable |
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What is a transitional zone?
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The transition zone is the area from C6 – T2 and T11 – L2 where the spine transitions from Cervical to Thoracic and then Thoracic to Lumbar. |
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Describe the lumbar vertebrae in terms of size and shape.
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Lumbar spine is made up of five vertebrae, L1 – L5. ; Vertebral bodies are large and kidney-shaped when viewed superiorly, being wider in the M-L dimension than in the A-P dimension.;
The Pedicles are oval-shaped in the coronal plane and wider than those of the thoracic spine.;
The Transverse Processes are not a large as in the thoracic spine.;
The Spinous Processes are large, square, and horizontal, allowing enough room for the cauda equine and the nerve roots that control the lower extremities. |
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Describe the lumbar vertebral foramen as it pertains to space and shape. |
Wide & triangular; similar to cervical region;
Allows enough space for the cauda equina and the nerve roots that control the functions of the lower extremities |
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The nerve roots occupy about what percentage of the intervertebral foramina in the lumbar region?
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33%
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Because it is largely cancellous bone, screw fixation in the sacrum must be done with what kind of technique to avoid screw pullout?
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Bicortical Technique |
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Which pedicles are generally used for screw fixation in the sacrum?
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S1 & S2 pedicles |
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What is another name for the tailbone?
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Coccyx |
