“Here we tested whether a ‘blunted’ response to amphetamine in methamphetamine ( MA ) users extends to D3-rich brain areas.”
“Relative to healthy controls, MA users had greater decreases in [11C]-(+)-PHNO binding (increased dopamine release) after amphetamine in D3-rich substantia nigra (36 vs 20%, p=0.03) and globus pallidus (30 vs 17%, p=0.06), which correlated with self-reported ‘drug wanting’.”