Related Experiment Video
Updated: May 21, 2026
11:02
Vagus Nerve Stimulation as a Tool to Induce Plasticity in Pathways Relevant for Extinction Learning
Published on: August 21, 2015
A dimmer switch for reward: the vagus sets the gain
Hongyun Wang1, Shuhan Liu2, Ling Bai3
1Beijing Institute for Brain Research, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 102206, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China; Beijing Key Laboratory of Brain Science and Brain-Machine Interface, Chinese Institute for Brain Research, Beijing 102206, China.
Trends in Neurosciences
|April 26, 2026
Summary
The vagus nerve is crucial for motivation and reward. Its integrity is essential for dopamine release and mesolimbic circuit structure, acting as a gatekeeper for reward responses.
Area of Science:
- Neuroscience
- Gastroenterology
- Behavioral Science
Background:
- The vagus nerve transmits signals from the gut to the brain's reward centers.
- Its role in reward processing is complex and not fully understood.
Purpose of the Study:
- To investigate the role of vagal nerve integrity in maintaining reward responses.
- To determine if the vagus nerve is essential for dopamine release and mesolimbic circuit function.
Main Methods:
- The study examined the necessity of vagal integrity for reward processing.
- Researchers assessed dopamine release and mesolimbic circuit structure.
Main Results:
- Vagal integrity is required for maintaining dopamine release.
- The vagus nerve is essential for the structural integrity of the mesolimbic system.
- These elements are critical for mounting effective reward responses.
Conclusions:
- The vagus nerve acts as a tonic gatekeeper of motivation and reward.
- Findings highlight the vagus nerve's critical role beyond signal relay in reward circuitry.
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