Sciatica. Coloured magnetic resonance imaging (MRI) scan of a sagittal section through the lumbar (lower back) spine of a 35-year-old patient, showing
Sciatica. Coloured magnetic resonance imaging (MRI) scan of a sagittal section through the lumbar (lower back) spine of a 35-year-old patient, showing a herniated (slipped) intervertebral disc that is the cause of sciatica. Sciatica is caused by compression or irritation of one of five spinal nerve roots that give rise to each sciatic nerve, or of the sciatic nerves themselves. Here the nerves are trapped by the herniated disc.
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Photo credit: © ZEPHYR/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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