Diagram of spinal cord, showing its four regions - cervical, thoracic, lumbar, and sacral

Dorsal view of spinal cord shows the cervical, thoracic, sacral, and lumbar regions. The arrow at C1-C2 shows the location of Christopher Reeve's injury. The arrow at T8 shows the equivalent position in a human for the experiments in rats that Swedish researchers reported in 1996. (See: "Swedish Researchers Combine Treatments To Repair Rat Spinal Cords.")