The Solar Plexus or Abdominal Brain

. The Four Brains of Man Man has Four Brains — The Cerebrum; the Cerebellum; the Medulla Oblongata; the Solar Plexus or Abdominal Brain. What the Solar Plexus is. and where it is located. The centre of vegetative life. The power-house of physical energy. Why it is called “Solar.” The Sympathetic Nervous System, and its offices and functions. The seat of physical life.