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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.
Human Anatomy Â» Basic Anatomy Â» Spinal Nerves. Spinal nerve is generally defined as a mixed nerve, which carries motor, sensory and autonomic signals between spinal cord and the body. There are 31 pairs of spinal nerves, including 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.rea of skin supplied by a single segment of spinal cord is called a dermatome. Each spinal nerve is connected with the spinal cord by two roots, a ventral root which is motor, and a dorsal root which is sensory. The dorsal root is characterized by the presence of a spinal ganglion at its distal end.