Cervical spinal nerves (C1 to C8)
These nerves (eight pairs) supply the back of the head, the
neck and shoulders, the arms and hands, and the diaphragm.
• Thoracic spinal nerves (T1 to T12)
These nerves (12 pairs) supply the chest, some muscles of the
back, and parts of the abdomen.
• Lumbar spinal nerves (L1 to L5)
These nerves (five pairs) supply the lower parts of the
abdomen and the back, the buttocks, some parts of the
external genital organs, and parts of the legs.
• Sacral spinal nerves (S1 to S5)
These nerves (five pairs) supply the thighs and lower parts of
the legs, the feet, most of the external genital organs, and the
area around the anus.