| Confrontation with blood and disgust stimuli precipitates respiratory dysregulation in blood-injection-injury phobia. | |
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MedLine Citation:
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PMID: 20167246 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Blood-injection-injury (BII) phobia patients sometimes faint during exposure to relevant stimuli. However, mechanisms and timing of physiological adjustments in BII phobia remain poorly understood. In a larger sample of 60 patients and 20 controls, we sought to replicate findings of a prior study demonstrating the role of hyperventilation in the phobic response. We also investigated the timing of respiratory adjustment across an extended exposure recovery period. In addition, because intense disgust is commonly reported by patients, responses to surgery films were compared to a pure disgust film. End-tidal PCO(2) dropped significantly while volume and flow increased during the surgery film in patients compared to controls and to other emotional films except disgust. Patients recovered quickly following the disgust film but not the surgery film. PCO(2), volume, and flow parameters showed robust associations with anxiety, disgust, and physical symptoms. Findings suggest that respiratory adjustments during and after phobic exposure may provide a critical missing link in the understanding of the psychophysiology of this singular disorder, including why fainting often occurs after the stimulus is removed. |
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Authors:
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Erica S Ayala; Alicia E Meuret; Thomas Ritz |
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Publication Detail:
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Type: Journal Article Date: 2010-02-16 |
Journal Detail:
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Title: Biological psychology Volume: 84 ISSN: 1873-6246 ISO Abbreviation: Biol Psychol Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2011-01-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375566 Medline TA: Biol Psychol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 88-97 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Psychology, Southern Methodist University, Dallas, TX, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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