A mechanistic account of striatal dopamine function in human cognition: psychopharmacological studies with cabergoline and haloperidol.
The authors test a neurocomputational model of dopamine function in cognition by administering to healthy participants low doses of D2 agents cabergoline and haloperidol. The model suggests that DA dynamically modulates the balance of Go and No-Go basal ganglia pathways during cognitive learning and performance. Cabergoline impaired, while haloperidol enhanced, Go learning from positive reinforcement, consistent with presynaptic drug effects. Cabergoline also caused an overall bias toward Go responding, consistent with postsynaptic action. These same effects extended to working memory and attentional domains, supporting the idea that the basal ganglia/dopamine system modulates the updating of prefrontal representations. Drug effects interacted with baseline working memory span in all tasks. Taken together, the results support a unified account of the role of dopamine in modulating cognitive processes that depend on the basal ganglia.
Frank
Michael J
MJ
Department of Psychology and Program in NeuroscienceUniversity of Arizona, Tucson, AZ 85721, USA. mfrank@u.arizona.edu
O'Reilly
Randall C
RC
D000293:Adolescent; D000328:Adult; D001288:Attention / Q000187:drug effects; D000077465:Cabergoline; D002755:Choice Behavior / Q000187:drug effects; D003071:Cognition / Q000187:drug effects*; D003198:Computer Simulation; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D018491:Dopamine Agonists / Q000494:pharmacology*; D018492:Dopamine Antagonists / Q000494:pharmacology*; D004873:Ergolines / Q000494:pharmacology*; D005260:Female; D005793:Generalization, Psychological / Q000187:drug effects; D006220:Haloperidol / Q000494:pharmacology*; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000187:drug effects; D008959:Models, Neurological; D009483:Neuropsychological Tests; D011337:Probability Learning; D011388:Prolactin / Q000097:blood; D055815:Young Adult
D018491:Dopamine Agonists; D018492:Dopamine Antagonists; D004873:Ergolines; D011388:Prolactin; D006220:Haloperidol; D000077465:Cabergoline; D004298:Dopamine