Prefrontal reinstatement of contextual task demand is predicted by separable hippocampal patterns

Jiefeng Jiang (), Shao-Fang Wang, Wanjia Guo, Corey Fernandez and Anthony D. Wagner
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Jiefeng Jiang: Stanford University
Shao-Fang Wang: Stanford University
Wanjia Guo: University of Oregon
Corey Fernandez: Stanford University
Anthony D. Wagner: Stanford University

Nature Communications, 2020, vol. 11, issue 1, 1-12

Abstract: Abstract Goal-directed behavior requires the representation of a task-set that defines the task-relevance of stimuli and guides stimulus-action mappings. Past experience provides one source of knowledge about likely task demands in the present, with learning enabling future predictions about anticipated demands. We examine whether spatial contexts serve to cue retrieval of associated task demands (e.g., context A and B probabilistically cue retrieval of task demands X and Y, respectively), and the role of the hippocampus and dorsolateral prefrontal cortex (dlPFC) in mediating such retrieval. Using 3D virtual environments, we induce context-task demand probabilistic associations and find that learned associations affect goal-directed behavior. Concurrent fMRI data reveal that, upon entering a context, differences between hippocampal representations of contexts (i.e., neural pattern separability) predict proactive retrieval of the probabilistically dominant associated task demand, which is reinstated in dlPFC. These findings reveal how hippocampal-prefrontal interactions support memory-guided cognitive control and adaptive behavior.

Date: 2020
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DOI: 10.1038/s41467-020-15928-z

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