Which option best describes contextual effects of balance?

• A. All of the above factors influence balance
• B. Closed environment
• C. Support surface
• D. Lighting

Answer: (A)

Balance depends on the context in which a person is trying to stand or move. Our postural control uses input from vision, the vestibular system, and somatosensory information to stay upright, and how stable we feel changes when the surrounding environment, the surface we’re standing on, or the lighting changes. In a closed environment, fewer ambient cues or more fixed surroundings can alter how we rely on different senses. On a given support surface, the firmness, texture, and even tilt affect the amount of sensory feedback from the feet and ankles. Lighting changes how clearly we can see our surroundings, which shifts how much visual input contributes to balance. Because balance is influenced by multiple contextual factors, the best description is that all of these factors influence balance.