Thoracic nerves are the nerves that originate from the thoracic vertebrae and provide innervation to the muscles and organs located in the chest and upper back. Synonyms for thoracic nerves include intercostal nerves, dorsal nerves, and thoracicoabdominal nerves. Intercostal nerves are the nerves that originate from the spinal cord between the thoracic vertebrae and provide sensory and motor innervation to the intercostal muscles, chest wall, and abdominal muscles. Dorsal nerves are the nerves that emerge from the posterior aspect of the spinal cord and provide sensory and motor innervation to the back muscles and skin. Thoracicoabdominal nerves are the nerves that provide innervation to both the thorax and abdomen.