the 31 pairs of nerves that leave the spinal cord and are distributed to the body, passing out from the vertebral canal through the spaces between the arches of the vertebrae. Each nerve has two root, an anterior, carrying motor nerve fibres, and a posterior, carrying sensory fibres. Immediately after the roots leave the spinal cord they merge to form a mixed spinal nerve on each side.
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nervi spinales.Medical dictionary. 2011.