Abstract
Repeated amphetamine (AMPH) administration into the nucleus accumbens does not enhance (sensitize) the locomotor activity produced by a subsequent systemic AMPH challenge. We report here, however, that pretreatment with systemic injections of AMPH does produce a significant enhancement in the locomotor stimulant effects produced by intra-accumbens AMPH given 21 days after the last pretreatment injection of AMPH. These data support the hypothesis that neural adaptations in dopamine (DA) terminal fields are sufficient for theexpression of AMPH sensitization, although an action on DA cell bodies may be required for theinduction of AMPH sensitization.
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Paulson, P.E., Robinson, T.E. Sensitization to systemic amphetamine produces an enhanced locomotor response to a subsequent intra-accumbens amphetamine challenge in rats. Psychopharmacology 104, 140–141 (1991). https://doi.org/10.1007/BF02244569
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DOI: https://doi.org/10.1007/BF02244569