Spinal nerve: One of the nerves that originates in the spinal cord. There are 31 pairs of spinal nerves: 8 cervical nerves, 12 thoracic nerves, 5 lumbar nerves, 5 sacral nerves, and 1 coccygeal nerve.
Quick GuideLow Back Pain: Symptoms, Causes, Treatment, Relief
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Last Editorial Review: 6/9/2016