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What does the thoracolumbar fascia cover?
Key muscles in the centre of the trunk and low back
The entire length of the spine
The lumbar spine onto the sacrum
Muscle fiber contents
The correct answer is: Key muscles in the centre of the trunk and low back
The thoracolumbar fascia covers key muscles in the centre of the trunk and low back. This is because the thoracolumbar fascia is a strong connective tissue that runs from the thoracic spine to the lumbar spine, providing support and protection to these key muscles. Option B is incorrect because the thoracolumbar fascia does not cover the entire length of the spine, as it does not extend all the way to the cervical spine. Option C is incorrect because the thoracolumbar fascia does not cover the sacrum, which is a separate bone from the lumbar spine. Lastly, option D is incorrect because the thoracolumbar fascia primarily covers muscles and not the muscle fibers themselves.