thoracic spinal nerve 10 thoracic spinal nerve 10 the thoracic spinal nerve 10 (t10) is a spinal nerve of the thoracic segment. thoracic spinal nervethe spinal cord with spinal nerves.t10+detailsidentifierslatinnervi spinalisfma6309anatomical terminology it originates from the spinal column from below the thoracic vertebra 10 (t10).