Psychopharmacology
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Repeated administration of psychostimulants such as amphetamine (AMPH) produces an enduring augmentation of their locomotor effects. Previous research suggests that this phenomenon, termed sensitization, is related to changes within the mesolimbic dopamine (DA) system. ⋯ These results suggest that CCK(B) and CCK(A) receptors modulate the development and the expression of behavioral sensitization to AMPH, respectively.