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Questions and Answers
What is the main function of the sacral hiatus?
What is the main function of the sacral hiatus?
- To allow the spinal nerves to exit (correct)
- To prevent anterior translation of L5 over S1
- To articulate with the coccyx
- To form the posterior sacral foraminae
Which lumbar vertebrae have a coronal orientation of facet joints?
Which lumbar vertebrae have a coronal orientation of facet joints?
- L3-L4
- L1-L3
- L5-S1 (correct)
- L4-L5
What is the typical shape of the IV disc at L4-L5 and L5-S1?
What is the typical shape of the IV disc at L4-L5 and L5-S1?
- Thicker posteriorly
- Triangular
- Wedge-shaped (correct)
- Thinner anteriorly
What is the main function of the posterior sacroiliac ligament?
What is the main function of the posterior sacroiliac ligament?
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Why does the lumbar spine have sagittal-oriented facets in upper lumbar vertebrae?
Why does the lumbar spine have sagittal-oriented facets in upper lumbar vertebrae?
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What causes instability in pelvic fractures according to the text?
What causes instability in pelvic fractures according to the text?
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