Which age-related changes contribute to increased fall risk in vestibular function?

• A. Age-related hair cell and nerve decline, loss of central integration, reduced VOR gain, and proprioceptive changes increase fall risk.
• B. Aging improves VOR gain.
• C. Aging only affects hearing, not vestibular function.
• D. Aging reduces vestibular reflexes but not fall risk.

Answer: (A)

Age-related changes in the vestibular system contribute to fall risk by weakening how we detect head motion, how those signals are transformed into stable gaze and postural responses, and how sensory inputs are integrated for balance. As we age, there is loss of vestibular hair cells and the nerve fibers that carry their signals. That reduces sensitivity to head movements and diminishes the information available to keep track of motion. The neural pathways carrying vestibular information also decline, meaning signals reach the brain more slowly and less reliably.

Central processing of vestibular input with other senses—vision and proprioception—also becomes less efficient, so combining cues to maintain balance is impaired. The vestibulo-ocular reflex, which stabilizes gaze during head movements, shows reduced gain in older adults, leading to blurred vision and less stable gaze when turning or looking around. Proprioceptive changes in joints and muscles reduce awareness of body position, further compromising balance.

All these factors together raise postural sway and slow corrective responses, which heighten the risk of falls.

The other statements don’t fit because aging does not improve the vestibulo-ocular reflex; vestibular function is affected, not just hearing; and reducing vestibular reflexes does contribute to fall risk, so claiming it does not affect fall risk isn’t accurate.