Salaris, Andrea, Azevedo, Ruben T. (2024) Investigating the modulation of gastric sensations and disposition toward food with taVNS. Psychophysiology, . Article Number e14735. ISSN 0048-5772. E-ISSN 1469-8986. (doi:10.1111/psyp.14735) (KAR id:108117)
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Official URL: https://doi.org/10.1111/psyp.14735 |
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.
Item Type: | Article |
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DOI/Identification number: | 10.1111/psyp.14735 |
Uncontrolled keywords: | appetite regulation; autonomic; gastric; interoception; vagus nerve stimulation |
Subjects: | B Philosophy. Psychology. Religion > BF Psychology |
Divisions: | Divisions > Division of Human and Social Sciences > School of Psychology |
Funders: | European Union (https://ror.org/019w4f821) |
Depositing User: | Ruben Andre Teixeira Azevedo |
Date Deposited: | 09 Dec 2024 09:55 UTC |
Last Modified: | 10 Dec 2024 12:44 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/108117 (The current URI for this page, for reference purposes) |
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