The Solar Plexus is the common name for a network of nerves in the area just above the belly button. It is not important to know what the physical functions of this set of nerves is, only that this general area is directly affected by one’s emotional state, and in turn affects the stomach and all of the nerves, muscles and connective tissues in the immediate proximity.
Mystics have long known about this ‘emotional centre’ that has given us so much trouble. The great Tibetan saint Milarepa of the 11th century, who spent years meditating in a cave, knew that to achieve his goal of freedom, one of the things he had to do was to release himself from the bonds and grip that the emotional centre had over him.