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Psychophysiology
Article . 2024 . Peer-reviewed
License: CC BY
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Psychophysiology
Article . 2025
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Investigating the modulation of gastric sensations and disposition toward food with taVNS

Authors: Andrea Salaris; Ruben T. Azevedo;

Investigating the modulation of gastric sensations and disposition toward food with taVNS

Abstract

Abstract Interoception, the perception of visceral sensations, is key for several survival functions, including those related to feeding behavior. Sensations of hunger and satiety are mediated by gastric signals transmitted via the vagus nerve to the Nucleus of Solitary Tract. Transcutaneous auricular vagus nerve stimulation (taVNS) has been shown to modulate brain‐viscera communication and to impact interoceptive processing in the cardiac domain. Yet, its effect on gastric interoception remains unclear. The aim of this study was to investigate taVNS' modulatory effects on gastric interoception using the Water Load Test‐II (WLT‐II) and its impact on food‐related dispositions through a disposition and willingness to eat task (DWET). Participants underwent active or sham taVNS while performing the WLT‐II and DWET. Results showed no significant difference in gastric interoceptive accuracy and amount of water ingested between taVNS groups. However, we found a significant reduction in food liking after the fullness phase of the WLT‐II in the active (vs sham) taVNS group, suggesting an influence of vagal activation in the inhibition of food enjoyment when satiated. These findings suggest that, while taVNS may not directly enhance gastric interoceptive accuracy at a conscious level, it influences food‐related dispositions, likely by modulating the processing of gastric signals. Further research exploring the intricate relationship between vagal modulation, interoceptive abilities and eating behaviors is warranted to elucidate the underlying mechanisms and, possibly, develop targeted interventions for eating disorders.

Country
Italy
Related Organizations
Keywords

Male, Adult, Vagus Nerve Stimulation, Hunger, Stomach, Special Issue Article, Feeding Behavior, appetite regulation; autonomic; gastric; interoception; vagus nerve stimulation, Satiation, Interoception, Young Adult, Eating, Transcutaneous Electric Nerve Stimulation, Humans, Female

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Top 10%
Average
Top 10%
Green
hybrid