What might an under-reactive vestibulo-proprioceptive dysfunction look like?

• A. Desires increased velocity and acceleration; Rarely feels nauseated or dizzy; No attempt to catch self when falling
• B. Avoids movement and is fearful
• C. Constant nausea and dizziness
• D. Strong vestibular reactions to all sensations

Answer: (A)

Under-reactive vestibulo-proprioceptive dysfunction means the system doesn’t register movement input strongly enough, so the person seeks out more movement to achieve arousal. The best-fit description is someone who desires faster, bigger movements to feel the input, rarely feels nauseated or dizzy despite that movement, and shows poor protective responses like not attempting to catch themselves when falling. This combination reflects low reactivity to vestibular input with compensatory movement seeking and reduced automatic protective actions.

The other patterns describe over-reactivity rather than under-reactivity: avoidance or fear of movement fits hyper-sensitive vestibular processing; constant nausea or dizziness suggests motion sensitivity with heightened responses; strong reactions to all sensations imply global sensory over-responsivity rather than a specific hypo-responsive vestibulo-proprioceptive pattern.