Bednarczuk et al (Brain 142, 606–616 (2019)) investigated ocular and perceptual thresholds in vestibular migraineurs (VM) before and after visual motion exposure. The researchers argue that VM prevents a patient from appropriately filtering through cortical noise, like dizziness. While vestibular conditions like benign paroxysmal positional vertigo (BPPV) can elevate baseline sensory thresholds, this would explain how VM uniquely disrupts a patient’s ability to faithfully encode
motion and changes in orientation after stimulus exposure.
