solar plexus The ganglion of nerve cells and fibers situated at the back of the abdomen which subserves autonomic nervous system function for much of the gastrointestinal tract. A sharp blow on the abdomen over the solar plexus causes visceral pain and "winding." Related category • ANATOMY AND PHYSIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |