duality of central nervous system control /dyo̅o̅·al″itē/ , a theory that the normal central nervous system is regulated by a check-and-balance feedback program. The theory is based on studies of posture-movement, mobility-stability, flexion-extension synergies, and similar action-reaction examples related to laws of basic physics. Duality theorists suggest that central nervous system disorders result from imbalances in the feedback system.
