Abstract：
:The impulse to act for immediate reward often conflicts with more deliberate evaluations that support long-term benefit. The neural architecture that negotiates this conflict remains unclear. One account proposes a single neural circuit that evaluates both immediate and delayed outcomes, while another outlines separate impulsive and patient systems that compete for behavioral control. Here we designed a task in which a complex payout structure divorces the immediate value of acting from the overall long-term value, within the same outcome modality. Using model-based fMRI in humans, we demonstrate separate neural representations of immediate and long-term values, with the former tracked in the anterior caudate (AC) and the latter in the ventromedial prefrontal cortex (vmPFC). Crucially, when subjects' choices were compatible with long-run consequences, value signals in AC were down-weighted and those in vmPFC were enhanced, while the opposite occurred when choice was impulsive. Thus, our data implicate a trade-off in value representation between AC and vmPFC as underlying controlled versus impulsive choice.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Economides M,Guitart-Masip M,Kurth-Nelson Z,Dolan RJdoi
10.1016/j.neuroimage.2014.12.071subject
Has Abstractpub_date
2015-04-01 00:00:00pages
206-16eissn
1053-8119issn
1095-9572pii
S1053-8119(14)01077-5journal_volume
109pub_type
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