BACKGROUND
Addictive drugs lead to reinforcing properties by increasing dopamine in the nucleus accumbens, which is composed of a core and shell regions. Neurons in the nucleus accumbens are divided into 2 subtypes based on the differential gene expression of the dopamine D₁ receptors and D₂ receptors.
METHODS
In the present study, we investigated the role of D₂ receptors in the nucleus accum...
