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Behavioral variability through stochastic choice and its gating by anterior cingulate cortex.

Dougal G R Tervo1, Mikhail Proskurin1, Maxim Manakov1

  • 1Howard Hughes Medical Institute, Janelia Research Campus, 19700 Helix Drive, Ashburn, VA 20147, USA.

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|September 27, 2014
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Summary
This summary is machine-generated.

Rats switch from strategic decision-making to a stochastic mode when facing unbeatable competitors. This behavioral shift, controlled by locus coeruleus input to the anterior cingulate cortex (ACC), allows for exploration under uncertainty.

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Computational Neuroscience

Background:

  • Animals typically use past experiences to optimize decisions.
  • However, exploration and unpredictability are also crucial for survival.
  • The neural mechanisms underlying the switch between these behavioral strategies are not fully understood.

Purpose of the Study:

  • To investigate how rats switch between strategic and stochastic behavioral modes.
  • To identify the neural circuits controlling this behavioral flexibility.
  • To understand the role of the anterior cingulate cortex (ACC) and locus coeruleus (LC) in decision-making under uncertainty.

Main Methods:

  • Behavioral experiments with rats facing virtual competitors.
  • Circuit perturbations in transgenic rats.
  • Electrophysiological recordings and optogenetic manipulations.
  • Analysis of behavioral strategies and neural activity in the ACC and LC.

Main Results:

  • Rats employ history- and model-based strategies against predictable competitors.
  • Rats switch to a stochastic mode, ignoring outcomes, when facing unpredictable competitors.
  • This switch is mediated by locus coeruleus input to the anterior cingulate cortex (ACC).
  • Suppression of ACC engagement is observed during stochastic behavior.

Conclusions:

  • The brain can switch between optimizing behavior based on experience and adopting unpredictable strategies.
  • Locus coeruleus (LC) input to the anterior cingulate cortex (ACC) controls this behavioral flexibility.
  • Noradrenergic modulation of ACC output enables adaptive decision-making under environmental uncertainty.