What does compensation refer to in vestibular disorders?

• A. CNS adaptive changes that restore balance and gaze stability after unilateral loss
• B. Temporary sensory adaptation by the cortex
• C. Spontaneous remission of vestibular symptoms
• D. Peripheral regeneration of balance organs

Answer: (D)

Compensation is the brain adapting to vestibular loss to restore balance and keep gaze stable. When one vestibular system is impaired, neural circuits in the brainstem and cerebellum reweight and recalibrate how we use input from the remaining vestibular organs, vision, and proprioception. This central plasticity adjusts the vestibulo-ocular reflex and refines postural control so you can steady your gaze and maintain balance despite reduced input on one side. It develops over days to weeks and is the basis for vestibular rehabilitation efforts that encourage the CNS to recalibrate rather than waiting for peripheral organs to regrow. Peripheral regeneration of balance organs isn’t the mechanism behind compensation, so the focus is on central adaptation rather than trying to restore the peripheral input.