title: Enhanced responsiveness to intraventricular infusion of amphetamine following its repeated systemic administration.
abstract: Previous studies have demonstrated that long-term administration of d-amphetamine produces a progressive augmentation of behavior. In the present experiment, rats receiving repeated systemic injections responded to an intraventricular infusion of d-amphetamine with an augmented increase in locomotor activity. These results indicate that central mechanisms, rather than peripheral dispositional factors, subserve the enhanced behavioral response to repeated amphetamine administration.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D003913:Dextroamphetamine / Q000008:administration & dosage / Q000494:pharmacology*; D006801:Humans; D007276:Injections, Intraventricular; D008297:Male; D009043:Motor Activity / Q000187:drug effects; D051381:Rats; D013239:Stereotyped Behavior / Q000187:drug effects; D013997:Time Factors
chemical_list: D003913:Dextroamphetamine