Which sense do older adults typically rely on the most for postural stability?

• A. Vestibular
• B. Vision
• C. Somatosensory
• D. Auditory

Answer: (B)

Visual information provides the most reliable external reference for orientation in space, so the nervous system tends to rely on it most for balance. As people age, proprioceptive (somatosensory) input from the feet and ankles and vestibular function often decline, making vision the primary source the brain uses to determine body position and movement. When vision is available, older adults can maintain stability more effectively, but removing visual input (like in the dark or with eyes closed) typically causes a larger increase in sway for them than for younger individuals. Auditory cues don’t contribute significantly to postural stability, and while somatosensory and vestibular inputs still matter, they’re more compromised with age, so vision becomes the dominant reference for balance.