Disgust regulation via placebo: an fMRI study
Anne Schienle1, Sonja Übel2, Florian Schöngaßner2
1Department of Clinical Psychology, University of Graz, A-8010 Graz, Austria anne.schienle@uni-graz.at.
Social Cognitive and Affective Neuroscience
|July 23, 2013
Summary
Placebo treatment significantly reduced disgust feelings and insula activation in women. This suggests that placebos can modulate specific emotional states, potentially serving as an initial therapy for excessive disgust.
Area of Science:
- Neuroscience
- Psychology
- Psychiatry
Background:
- Excessive disgust is a common symptom in various psychiatric disorders.
- Current treatments for disgust-related conditions can be limited in efficacy.
- Understanding the neural mechanisms of disgust modulation is crucial for developing new therapies.
Purpose of the Study:
- To investigate the effects of placebo treatment on subjective disgust.
- To examine the neural correlates of placebo-induced changes in disgust.
- To explore the impact of placebo on brain network connectivity related to disgust processing.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
- A retest design involved presenting participants with disgusting, fear-eliciting, and neutral images.
- Participants received either a placebo (inert pill with suggestion) or no placebo.
Main Results:
- Placebo treatment led to a significant decrease in experienced disgust.
- Reduced activation in the insula was observed following placebo administration.
- Placebo altered connectivity within a network including the insula, amygdala, anterior cingulate cortex, and orbitofrontal cortex.
Conclusions:
- Placebo administration can effectively modulate subjective disgust and associated neural activity.
- The findings suggest that placebo interventions may be a viable first-step therapy for individuals with excessive disgust.
- This research highlights the potential of placebo effects in managing specific affective states.
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