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Related Experiment Video

Updated: Jun 26, 2025

An Automated T-maze Based Apparatus and Protocol for Analyzing Delay- and Effort-based Decision Making in Free Moving Rodents
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Aberrant effort-based reward dynamics in anhedonia.

Hailing Wen1, Menglin Wu1, Zhao Wang1

  • 1Department of Psychology, Dalian Medical University, 9 West Section, Lvshun South Road, Dalian 116044, China.

Cerebral Cortex (New York, N.Y. : 1991)
|May 14, 2024
PubMed
Summary

Anhedonia, a symptom of reward deficits, involves poorly understood motivational dysfunction. This study reveals that individuals with anhedonia show inefficient neural responses to effort and reward, impacting motivation.

Keywords:
ERPanhedoniaeffort expenditureneural dynamicsreward

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Science

Background:

  • Anhedonia is a core symptom in various psychiatric disorders, characterized by reduced pleasure and reward responsibilities.
  • Motivational deficits in anhedonia are linked to altered cost-benefit decision-making, but the underlying neural dynamics remain unclear.
  • Understanding how effort expenditure modulates neural responses to rewards is crucial for elucidating motivational dysfunction in anhedonia.

Purpose of the Study:

  • To investigate the neural dynamics of the effort-reward interplay in individuals with varying levels of anhedonia.
  • To examine how effort prospectively and retrospectively influences reward processing.
  • To identify specific neural differences in effort-based reward processing between high and low anhedonia groups.

Main Methods:

  • Utilized an effort-based monetary incentive delay task.
  • Employed event-related potential (ERP) analysis to assess neural dynamics.
  • Recruited a nonclinical sample categorized into high and low anhedonia groups based on questionnaire scores.

Main Results:

  • Effort prospectively reduced reward effects on contingent variation negativity and target-P3, while retrospectively enhancing outcome effects on feedback-P3.
  • The high-anhedonia group exhibited a reduced effort effect on target-P3 during effort expenditure compared to the low-anhedonia group.
  • Individuals with high anhedonia showed an increased effort-enhancement effect for neutral trials during the feedback-P3 period post-effort.

Conclusions:

  • Anhedonia is associated with inefficient neural control and motivation allocation during effort-based reward processing.
  • Findings highlight disruptions in the neural dynamics from effort preparation to production in individuals with anhedonia.
  • This research provides insights into the neural mechanisms underlying motivational deficits in anhedonia.