Document Detail

Spectral characteristics of heart period variability during cold face stress and shock avoidance in normal subjects.
MedLine Citation:
PMID:  8832123     Owner:  NLM     Status:  MEDLINE    
Spectral analysis of heart period variability was used to examine autonomic cardiac control in several tasks used in experimental and clinical assessments of autonomic nervous system function. Cardiovascular measures were recorded in healthy humans during quiet rest, reaction time shock-avoidance, cold face stress, and combined shock-avoidance/cold face stress. Shock-avoidance was characterized by sympathetic beta-adrenergic dominance, as evidenced by (1) shorter heart periods, (2) less high-frequency spectral power, (3) elevated low-frequency power, (4) increased ratios of low- to high-frequency power, and (5) a steep regression line fitted to the log-log plot of the power spectra. Cold face stress yielded (1) longer heart periods, (2) more high-frequency power, (3) decreased low-frequency spectral power, and (4) a flat regression slope, indicating vagal dominance. Quiet rest appeared as mildly vagal, with less total spectral power, and the combination task elicited a mixed vagal-sympathetic pattern. These results are discussed in the context of (1) the autonomic underpinnings of low-frequency power, (2) the autonomic effects of facial cooling, and (3) the utility of spectral analysis of heart period variability during autonomic challenge tasks for basic research and clinical application.
B H Friedman; J F Thayer; R A Tyrrell
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Clinical autonomic research : official journal of the Clinical Autonomic Research Society     Volume:  6     ISSN:  0959-9851     ISO Abbreviation:  Clin. Auton. Res.     Publication Date:  1996 Jun 
Date Detail:
Created Date:  1996-12-20     Completed Date:  1996-12-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9106549     Medline TA:  Clin Auton Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  147-52     Citation Subset:  IM    
Department of Psychology, Washington University, St Louis, MO 63130, USA. BHFRIEDM@ARTSCI.WUSTL.EDU
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MeSH Terms
Arrhythmias, Cardiac / physiopathology*
Avoidance Learning / physiology*
Blood Pressure / physiology
Cold Temperature
Reaction Time / physiology
Reference Values
Stress, Physiological / physiopathology*
Grant Support

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