A 60-year-old male presents to your office with low back pain after doing some gardening. The pain is localized to the right paraspinal muscle and does not radiate down the right leg. There is no incontinence and reflexes are normal. There is localized spasm of the right lumbosacral paraspinal muscles. MRI shows a mild right S1 disc bulge. The most likely reason for his back pain is:
A. Fibromyalgia
B. L5 radiculopathy
C. Muscle spasm
D. S1 radiculopathy
E. Spinal stenosis
Answer: C
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Biomechanics
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