Balance

• Balance is a complex process involving the reception and integration of sensory inputs, and the planning and execution of movement, to achieve a goal requiring upright posture. It is the ability to control the center of gravity over the base of support in a given sensory environment.
• Balance impairments negatively affect function, leading to disability. These impairments often restrict activity levels, produce abnormal compensatory motor behavior, and may require support from devices or assistance from others.

Source: Umphred, D.A. 2001. Neurological Rehabilitation. 4th Ed. U.S.A: Mosby, Inc.