Document Detail

Vagal withdrawal as a function of audience.
MedLine Citation:
PMID:  8967379     Owner:  NLM     Status:  MEDLINE    
This investigation examined the effects of psychosocial influences upon vagal cardiac activity. In this crossover, counter-balanced study, 15 subjects were assessed for vagal cardiac activity before and during a presentation in the presence and/or absence of an audience. Electrocardiograms (ECG) were collected throughout the epochs of interest, using a portable holter monitor system. Power spectral density analyses were used to decompose autonomic rhythmicities of heart rate variability. Significantly diminished vagal power was noted before and during presentation episodes with an audience compared with vagal power during a presentation without an audience (P < 0.05). Because respiration modulates autonomic outflow, ECG-derived respiration was derived and compared for all epochs, and no significant differences were noted. The real-life findings in the current investigation are strongly suggestive of the modulating effects of psychosocial interactions upon vagal cardiac electrophysiology and should be considered when assessing autonomic status.
R De Meersman; S Reisman; M Daum; R Zorowitz
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The American journal of physiology     Volume:  270     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1996 Apr 
Date Detail:
Created Date:  1996-12-04     Completed Date:  1996-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H1381-3     Citation Subset:  IM    
Department of Rehabilitation Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032, USA.
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MeSH Terms
Cross-Over Studies
Heart Conduction System / physiology*
Interpersonal Relations*
Middle Aged
Respiration / physiology
Vagus Nerve / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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