Psychology
Neurobiological Bases of Placebo Effects in Pain Management
Quick fact
Placebo analgesia can be completely blocked by naloxone, a drug that antagonizes opioid receptors, proving that placebo effects rely on the brain's own opioid system.
Why this is interesting
Have you ever felt pain vanish after taking a sugar pill you believed was medicine? That relief is not 'all in your head'—it's a measurable biological phenomenon.