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Heterogeneous reward signals in prefrontal cortex Wallis JD; Kennerley SWCurr Opin Neurobiol 2010[Apr]; 20 (2): 191-8Neurons encode upcoming rewards throughout frontal cortex. Recent papers have helped to determine that these signals play different roles in different frontal regions. Neurons in orbitofrontal cortex (PFo) appear to be responsible for calculating the specific value of an expected reward, information that can help efficiently guide decision-making. Similar signals are also present in the cingulate sulcus (PFcs). By contrast, reward signals in lateral prefrontal cortex (PFl) are consistent with a role in using reward to guide other cognitive processes, such as the allocation of attentional resources and using value information to guide learning other relationships in the environment such as arbitrary stimulus-response mappings. A remaining issue for future work is to specify the precise roles of PFo and PFcs. These two areas show very different patterns of connectivity with other brain areas, and it is currently unclear how this effects their contribution to decision-making.|*Reward[MESH]|Animals[MESH]|Attention/physiology[MESH]|Cognition/*physiology[MESH]|Decision Making/*physiology[MESH]|Executive Function/*physiology[MESH]|Humans[MESH]|Learning/physiology[MESH]|Nerve Net/anatomy & histology/*physiology[MESH]|Neurons/physiology[MESH]|Prefrontal Cortex/anatomy & histology/*physiology[MESH] |
