Segments of Spinal cord A portion of the cord that gives rise to a pair of spinal nerve constitutes a segment ◆ There are31 segments 8 cervical ss 12 thoracic ss 5 lumbar ss 5 sacral ss coccygeal s SegmentSegments of Spinal Cord A portion of the cord that gives rise to a pair of spinal nerve constitutes a segment. There are 31 segments 8 cervical ss 12 thoracic ss 5 lumbar ss 5 sacral ss 1 coccygeal s Segment - s