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A cognitive map for value-guided choice in the ventromedial prefrontal cortex.

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  • 1Department of Experimental Psychology, University of Oxford, Oxford OX1 3SR, UK.

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Summary

The ventromedial prefrontal cortex (vmPFC) uses a cognitive map to represent economic choices. This grid-like neural code in the vmPFC supports flexible decision-making and value comparison.

Keywords:
cognitive mapgrid cellsgrid-like codingprospect theorysharp-wave ripplestheta frequencyventromedial prefrontal cortex

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Behavioral Economics

Background:

  • The prefrontal cortex (PFC) is vital for economic decision-making.
  • Mechanisms by which PFC value representations enable flexible decisions are not fully understood.

Purpose of the Study:

  • To investigate how the PFC represents values to facilitate flexible economic decisions.
  • To reframe economic decision-making as a navigation process through a cognitive map of choice values.

Main Methods:

  • Analysis of local field potential theta frequency and neuronal activity in the ventromedial PFC (vmPFC) of rhesus macaques.
  • Utilized two independent datasets to validate findings.
  • Investigated the presence of sharp-wave ripples in the vmPFC.

Main Results:

  • Rhesus macaques represented choices as navigation trajectories within a value space, employing a grid-like code.
  • This grid-like coding was observed in vmPFC local field potential theta frequency.
  • vmPFC neurons exhibited the same grid-like code, encoding chosen value, modulated by theta phase on separate theta cycles.
  • Sharp-wave ripples, indicative of planning and flexible behavior, were detected in the vmPFC.

Conclusions:

  • The vmPFC employs cognitive map-based computations to organize and compare values for economic choices.
  • This suggests an alternative neural architecture for economic decision-making within the PFC.
  • Findings highlight the role of grid-like codes and theta phase in value representation and flexible behavior.