ventromedial half of each somite that forms the vertebral body and intervertebral disc. (More? Musculoskeletal Notes | Week 3 Notes)
a zone of the skeleton supplied by an individual spinal sensory nerve, and represents a basic unit of vertebral embryonic development
Historical depiction, via a body map, indicating regions of the body that are supplied by a spinal nerve, presumably corresponding to an area of pain or symptomatology.