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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
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Gastric Biofeedback in Virtual Reality: Feasibility, Efficacy and Self-Reported Experience.

Aline Tiemann1,2, Zoé van Dyck3,4, Claus Vögele3

  • 1Department of Psychology, Clinical Psychology and Psychotherapy, University of Fribourg, Av. de l'Europe 20, 1700, Fribourg, Switzerland. aline.tiemann@unifr.ch.

Applied Psychophysiology and Biofeedback
|October 23, 2025
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Summary
This summary is machine-generated.

Virtual reality gastric biofeedback shows promise in regulating normal gastric activity (normogastria) and reducing dysrhythmic activity. This novel approach, tested in a randomized controlled trial, demonstrated technical feasibility and positive user experiences.

Keywords:
BiofeedbackElectrogastrographyGastric biofeedbackVirtual reality

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Area of Science:

  • Gastroenterology
  • Human-Computer Interaction
  • Virtual Reality Technology

Background:

  • Dysrhythmic gastric activity (bradygastria, tachygastria) correlates with symptoms like nausea and epigastric discomfort.
  • Electrogastrography (EGG) biofeedback is a potential method for regulating gastric rhythm, but requires further investigation.
  • Limited experimental studies exist on gastric biofeedback interventions.

Purpose of the Study:

  • To evaluate a novel virtual reality (VR) gastric biofeedback training system.
  • To assess the system's impact on gastric myoelectric activity, specifically increasing normogastria and decreasing dysrhythmic activity.
  • To examine user-reported experiences, including motivation, attention, mood, and presence.

Main Methods:

  • A randomized controlled study with 94 participants across three groups: VR gastric biofeedback, 2D screen biofeedback, and a relaxation control.
  • Gastric activity was monitored before, during, and after training sessions.
  • Self-reported data on user experience and psychological measures were collected.

Main Results:

  • Training led to a peak in normogastria and a reduction in dysrhythmic gastric activity.
  • Participants reported enhanced ability to manage physical discomfort.
  • Both VR and 2D groups showed improved time perception and concentration compared to controls, with higher spatial presence in the VR group.

Conclusions:

  • The VR gastric biofeedback paradigm is technically feasible and positively evaluated by users.
  • Further research is necessary to elucidate underlying mechanisms and clinical applicability in patient populations.
  • The study provides a foundation for developing EGG biofeedback interventions using immersive technologies.