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Related Experiment Video

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Laboratory Administration of Transcutaneous Auricular Vagus Nerve Stimulation taVNS: Technique, Targeting, and Considerations
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Transcutaneous vagus nerve stimulation improves interoceptive accuracy.

V Villani1, M Tsakiris2, R T Azevedo3

  • 1Lab of Action Body, Department of Psychology, Royal Holloway, University of London, UK.

Neuropsychologia
|September 29, 2019
PubMed
Summary
This summary is machine-generated.

Non-invasive vagus nerve stimulation (taVNS) improved cardiac interoceptive accuracy and confidence. This brain stimulation technique shows potential for enhancing body-brain interaction research.

Keywords:
InteroceptionInteroceptive accuracyTranscutaneous vagus nerve stimulationVagustvns

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Area of Science:

  • Neuroscience
  • Psychology
  • Physiology

Background:

  • Interoception, the sense of the internal state of the body, is crucial for homeostatic regulation and decision-making.
  • Enhancing interoceptive accuracy is a key goal for understanding body-brain interactions.
  • Non-invasive brain stimulation techniques offer potential avenues for modulating interoceptive processing.

Purpose of the Study:

  • To investigate the effects of transcutaneous auricular vagus nerve stimulation (taVNS) on cardiac interoceptive accuracy.
  • To examine taVNS modulation of interoceptive sensibility (confidence) and interoceptive awareness (self-evaluation).
  • To explore taVNS as a tool for studying body-brain interactions.

Main Methods:

  • A single-blind, within-subjects design was employed.
  • Participants underwent active and sham taVNS.
  • Cardiac interoceptive accuracy was assessed using heartbeat counting and discrimination tasks.

Main Results:

  • Active taVNS significantly improved performance on the heartbeat discrimination task.
  • Heartbeat counting accuracy was not significantly affected by active taVNS.
  • Participants reported higher confidence (interoceptive sensibility) during active taVNS, but interoceptive awareness remained unchanged.

Conclusions:

  • Transcutaneous auricular vagus nerve stimulation (taVNS) can enhance specific aspects of cardiac interoception, particularly accuracy in signal detection.
  • taVNS shows promise as an intervention to modulate interoceptive processing and confidence.
  • These findings highlight the potential of taVNS as a tool for investigating the complex interplay between the brain and bodily signals.