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Although the ventromedial prefrontal cortex (vmPFC) has long been implicated in reward-guided decision making, its exact role in this process has remained an unresolved issue. Here we show that, in accordance with models of decision making, vmPFC concentrations of GABA and glutamate in human volunteers predict both behavioral performance and the dynamics of a neural value comparison signal. These data provide evidence for a neural competition mechanism in vmPFC that supports value-guided choice.

Original publication




Journal article


Nat Neurosci

Publication Date





960 - 961


Adolescent, Adult, Brain Mapping, Choice Behavior, Humans, Inhibition (Psychology), Male, Prefrontal Cortex, Psychomotor Performance, Reward, Young Adult