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Interoceptive Signals Bias Decision Making in Rhesus Macaques.

Michael A Cardenas1,2, Ryan P Le1, Tess M Champ1

  • 1Department of Physiology, College of Medicine, The University of Arizona, Tucson, AZ, USA.

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|July 19, 2024
PubMed
Summary
This summary is machine-generated.

Altering the body's physiological state with drugs reduced rhesus monkeys' tolerance for unpleasant stimuli. This suggests interoceptive signals from the body influence decision-making by altering aversion, not reward value.

Keywords:
AtenololGlycopyrrolateIsoproterenolMajor: Biological SciencesMinor: Psychological and Cognitive Sciencesapproachapproach-avoidance conflictautonomicavoidancebrain-body connectiondecision makingtachycardia

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Area of Science:

  • Neuroscience
  • Physiology
  • Behavioral Science

Background:

  • Interoceptive signals from the body to the brain are theorized to coordinate complex behaviors.
  • Understanding how bodily states influence decision-making is crucial for behavioral neuroscience.

Purpose of the Study:

  • To investigate the impact of experimentally altered physiological states on decision-making in rhesus monkeys.
  • To determine if autonomic nervous system changes selectively affect aversion tolerance or reward value.

Main Methods:

  • Administered glycopyrrolate (parasympathetic antagonist) and isoproterenol (sympathetic agonist) to induce a sympathetic-dominated state.
  • Assessed decision-making using an approach-avoidance task measuring tolerance for aversive stimuli.
  • Evaluated reward value using a food preference task.

Main Results:

  • Both drugs significantly reduced tolerance for aversive stimuli (hot stimulus, airflow).
  • Reward value, assessed via food preference, remained unaltered by glycopyrrolate.
  • Increased heart rate indexed the induced sympathetic-dominated peripheral state.

Conclusions:

  • Sympathetic-dominated physiological states selectively decrease tolerance for aversive stimuli.
  • Decision-making biases appear to be driven by interoceptive signals reflecting the body's physiological state.
  • These findings support the role of interoception in mediating behavioral responses to aversive situations.