How Substance Use Reprograms the Brain’s Reward System One Pathway, Many Drugs Every addictive substance converges on the same pathway. It runs from the ventral tegmental area to the nucleus accumbens. It’s the brain’s reinforcement engine. It stamps cues and actions with motivational value. It says: that thing matters, go get it. Dopamine is not…
— or, how convenience became a public health experiment, and who gets left holding the bottle Let’s begin with an image. It is a Saturday evening in late June 2026. The Juhannus bonfires have burned down. The herring has been eaten. The holiday buzz is fading—but not quite gone. The phone rings. It is not…