RT Journal Article
SR Electronic
T1 Predictability Modulates Human Brain Response to Reward
JF The Journal of Neuroscience
JO J. Neurosci.
FD Society for Neuroscience
SP 2793
OP 2798
DO 10.1523/JNEUROSCI.21-08-02793.2001
VO 21
IS 8
A1 Berns, Gregory S.
A1 McClure, Samuel M.
A1 Pagnoni, Giuseppe
A1 Montague, P. Read
YR 2001
UL http://www.jneurosci.org/content/21/8/2793.abstract
AB Certain classes of stimuli, such as food and drugs, are highly effective in activating reward regions. We show in humans that activity in these regions can be modulated by the predictability of the sequenced delivery of two mildly pleasurable stimuli, orally delivered fruit juice and water. Using functional magnetic resonance imaging, the activity for rewarding stimuli in both the nucleus accumbens and medial orbitofrontal cortex was greatest when the stimuli were unpredictable. Moreover, the subjects' stated preference for either juice or water was not directly correlated with activity in reward regions but instead was correlated with activity in sensorimotor cortex. For pleasurable stimuli, these findings suggest that predictability modulates the response of human reward regions, and subjective preference can be dissociated from this response.