Summary: Researchers mapped the precise brain pathway that drives the nocebo effect, the biological phenomenon where negative expectations actively amplify physical pain. The research reveals that anticipation, fear, or social observation triggers the release of a neurochemical called cholecystokinin (CCK). This chemical travels along a newly identified pathway to turn up the brain’s internal volume on pain sensitivity. The findings provide direct, physical proof that nocebo pain is a real biological response rather than an imagined symptom, offering a new […]
