thoracic spinal nerve 2 thoracic spinal nerve 2 the thoracic spinal nerve 2 (t2) is a spinal nerve of the thoracic segment. thoracic spinal nervethe plan of the cervical and brachial plexuses.the spinal cord with spinal nerves.detailsidentifierslatinnervi spinalisfma6169anatomical terminology it originates from the spinal column from below the thoracic vertebra 2 (t2).