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In the human there are 31 pairs of spinal nerves, one on each side of the vertebral column. These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccygeal regions of the spine.
Any of the nerves that arise in pairs from the spinal cord. The spinal nerves are distinguished from the cranial nerves, which, apart from the vagus nerve, are limited in their distribution to the head and neck. Like the cranial nerves, the spinal nerves are part of the peripheral nervous system.There are 31 pairs of spinal nerves in the human body: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. These emerge through spaces between the vertebrae.t consists solely of motor nerve fibers. The posterior root springs from the posterior part of the spinal cord, and consists of fibers which lead to the posterior column of the cord. These fibers are all sensory fibers.