Henry Gray (18251861). Anatomy of the Human Body. 1918.
Diagram of efferent sympathetic nervous system. Blue, cranial and sacral outflow. Red, thoracohumeral outflow. , Postganglionic fibers to spinal and cranial nerves to supply vasomotors to head, trunk and limbs, motor fibers to smooth muscles of skin and fibers to sweat glands. (Modified after Meyer and Gottlieb.)