1. Balance Mechanisms & Vestibular Disorders Balance is the ability to maintain the body’s center of mass over its base of support. Balance is achieved and maintained by a complex set of sensorimotor control systems (Figure 1 – left) that include sensory input from vision (sight), proprioception (touch), and the vestibular system (motion, equilibrium, spatial orientation); integration of that sensory input; and motor output to the eye and body muscles [1]. When any of these s