We can now measure the brain
This image depicts PET scans of a human brain taken at different intervals following administration of radioactive cocaine. Because the drug was “radiolabeled,” scientists can see precisely where cocaine binds in the brain (yellow signal) and for how long. Studies such as these teach scientists more about how cocaine exerts its devastating effects, and can illustrate to people in real time what happens to their brains on drugs.
As a result of scientific research, we know that addiction is a disease that affects both brain and behavior.