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Related Experiment Video

Updated: May 16, 2025

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Complementary roles for hippocampus and anterior cingulate in composing continuous choice.

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    This study reveals how the brain makes choices during continuous action. The hippocampus and anterior cingulate cortex (ACC) work together, with the hippocampus mixing strategies and the ACC deciding when to switch goals.

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    Area of Science:

    • Neuroscience
    • Cognitive Science
    • Control Theory

    Background:

    • Naturalistic behavior involves continuous actions toward dynamic goals.
    • Choice in such contexts involves reweighting goal-specific control policies based on environmental changes.

    Purpose of the Study:

    • To investigate the algorithmic and neural underpinnings of choice in continuous action tasks.
    • To understand the roles of the hippocampus and anterior cingulate cortex (ACC) in goal-directed behavior.

    Main Methods:

    • Examined human behavior and brain activity during a continuous prey-pursuit task.
    • Applied a novel control-theoretic decomposition to analyze behavioral strategies.
    • Analyzed population dynamics in the hippocampus and ACC during goal switches.

    Main Results:

    • Pursuit strategies were modeled as a meta-controller mixing lower-level controllers for specific goals.
    • Hippocampal ensemble dynamics reflected the blending of control policies.
    • ACC ensemble activity showed value-dependent ramping, indicating evidence accumulation for goal switching.

    Conclusions:

    • The hippocampus and ACC play complementary roles in continuous choice.
    • The hippocampus acts as a mixture controller for goal-specific policies.
    • The ACC functions as a meta-controller, guiding value-dependent switching.