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Nonlinear feedback modulation contributes to the optimization of flexible decision-making.

Xuanyu Wu1, Yang Zhou1,2,3,4

  • 1Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China.

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Summary

Neural activity in the primate brain shows how sensory evaluation and action selection interact during decision-making. This study reveals feedback connectivity in the posterior parietal cortex optimizes flexible decisions.

Keywords:
artificial neural networkattractor basindecision-makingfeedback modulationmonkey electrophysiologyneuroscienceposterior parietal cortexrhesus macaque

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Neural activity in the primate brain links sensory evaluation and action selection in decision-making.
  • The interaction between these neural processes and decision behaviors is not well understood.

Purpose of the Study:

  • To investigate the interplay between sensory evaluation and action selection in the posterior parietal cortex (PPC).
  • To understand how this interaction influences flexible decision-making in primates.

Main Methods:

  • Monkeys performed a flexible decision task involving visual stimuli and saccade choices.
  • Recorded neural activity in the PPC.
  • Utilized recurrent neural network modeling to analyze neural dynamics and feedback connections.

Main Results:

  • PPC activity related to abstract decisions was nonlinearly modulated by subsequent saccade choices.
  • Feedback connections, aligned with learned stimulus-response associations, likely mediate this modulation.
  • Selectivity-specific feedback connectivity strengthened neural population activity, enhancing decision reliability.

Conclusions:

  • Neural processes for sensory evaluation and action selection interact iteratively in the PPC.
  • Precise feedback connectivity is crucial for optimizing flexible decision-making.
  • This study elucidates a mechanism for adaptive behavioral control in primates.