Amphetamine modulates human incentive processing

Brian Knutson, James M. Bjork, Grace W. Fong, Daniel Hommer, Venkata S. Mattay, Daniel R. Weinberger

Research output: Contribution to journalArticle

Abstract

Research suggests that psychostimulants can physiologically alter dopamine kinetics in the ventral striatum (VS) and psychologically enhance mood and attention. Using event-related functional magnetic resonance imaging (fMRI), we conducted a within-subject, double-blind, placebo (PLAC)-controlled study of the effects of oral dextroamphetamine (AMPH, 0.25 mg/kg) treatment on brain activity and affect during incentive processing. In two counterbalanced scanning sessions 60-180 min after ingesting AMPH or PLAC, 8 healthy volunteers played a game involving anticipation and receipt of monetary gains and losses. Group and volume of interest analyses suggested that by enhancing tonic over phasic activation, AMPH treatment "equalized" levels of VS activity and positive arousal during anticipation of both gain and loss. These findings suggest that therapeutic effects of amphetamine on incentive processing may involve reducing the difference between anticipation of gains and losses.

Original languageEnglish (US)
Pages (from-to)261-269
Number of pages9
JournalNeuron
Volume43
Issue number2
DOIs
StatePublished - Jul 22 2004
Externally publishedYes

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'Amphetamine modulates human incentive processing'. Together they form a unique fingerprint.

  • Cite this