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Partial Adaptation to the Value Range in the Macaque Orbitofrontal Cortex.

Katherine E Conen1, Camillo Padoa-Schioppa2,3,4

  • 1Departments of Neuroscience.

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|March 6, 2019
PubMed
Summary
This summary is machine-generated.

Neurons in the orbitofrontal cortex (OFC) adapt to changing value ranges during economic decisions. Partial adaptation to both maximum and minimum values impacts choice variability and expected payoff.

Keywords:
decision-makingeconomic choiceneuronal plasticityoptimal codingrange adaptationsubjective value

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Area of Science:

  • Neuroscience
  • Decision Science
  • Behavioral Economics

Background:

  • Economic decisions rely on the orbitofrontal cortex (OFC).
  • OFC neurons encode subjective value, with encoding gain inversely related to value range.
  • Adaptation parameters in OFC neurons remained unclear.

Purpose of the Study:

  • Investigate how OFC neurons adapt to varying value ranges.
  • Examine additive changes in neuronal responses.
  • Understand the impact of adaptation on choice behavior.

Main Methods:

  • Recorded neuronal activity from rhesus monkeys during a juice choice task.
  • Divided sessions into blocks with distinct value ranges.
  • Simulated a linear decision model to analyze effects on choice.

Main Results:

  • OFC neuronal responses partially adapted to both maximum and minimum values.
  • Minimum neural activity increased in certain value ranges, elevating response offset.
  • Simulations showed increased minimum response elevates choice variability and lowers expected payoff.

Conclusions:

  • OFC neurons adapt to context-specific value ranges by adjusting to both extremes.
  • Partial adaptation leads to changes in response offset, impacting choice efficacy.
  • Optimal decision-making may occur within intermediate value ranges due to network dynamics.