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Frontal neocortex is thought to support our highest intellectual abilities, including our ability to plan and enact a sequence of tasks toward a desired goal. In everyday life, such task sequences are abstract in that they do not require consistent movement sequences and are often assembled “on the fly.” Yet, remarkably little is known about the necessity of frontal sub-regions for such control. Participants...
Over a century of scientific work has focused on defining the factors motivating behavioral learning. Observations in animals and humans trained on a wide range of tasks support reinforcement learning (RL) algorithms as accounting for the learning. Still unknown, however, are the signals that drive learning in naive, untrained subjects. Here, we capitalized on a sequential saccade task in which macaque...
Evidence suggests that lateral frontal cortex is hierarchically organized such that rostral frontal regions support more abstract representations than caudal regions. A recent fMRI study of language processing proposes that striatum may exhibit an analogous organization. We consider this hypothetical correspondence at both the cognitive and anatomical levels.
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