In Human Design one of the nine Centers. The Solar Plexus is complex and in mutation. It is one of the body's four motors. It is associated biologically with the kidneys, pancreas, and prostate. Known in Design as the emotional Wave, the Solar Plexus motor can be deeply distorting. Half of all humanity has this center defined. For this half of humanity, there is no truth in the now. Patience and time are the only allies of the Solar Plexus motor. A defined Solar Plexus is always the inner Authority in someone's Design. The other half of humanity, with this center undefined , has the not-self strategy of avoiding confrontation and truth.