Document Detail


Respiratory sinus arrhythmia as an index of vagal activity during stress in infants: respiratory influences and their control.
MedLine Citation:
PMID:  23300753     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Respiratory sinus arrhythmia (RSA) is related to cardiac vagal outflow and the respiratory pattern. Prior infant studies have not systematically examined respiration rate and tidal volume influences on infant RSA or the extent to which infants' breathing is too fast to extract a valid RSA. We therefore monitored cardiac activity, respiration, and physical activity in 23 six-month old infants during a standardized laboratory stressor protocol. On average, 12.6% (range 0-58.2%) of analyzed breaths were too short for RSA extraction. Higher respiration rate was associated with lower RSA amplitude in most infants, and lower tidal volume was associated with lower RSA amplitude in some infants. RSA amplitude corrected for respiration rate and tidal volume influences showed theoretically expected strong reductions during stress, whereas performance of uncorrected RSA was less consistent. We conclude that stress-induced changes of peak-valley RSA and effects of variations in breathing patterns on RSA can be determined for a representative percentage of infant breaths. As expected, breathing substantially affects infant RSA and needs to be considered in studies of infant psychophysiology.
Authors:
Thomas Ritz; Michelle Bosquet Enlow; Stefan M Schulz; Robert Kitts; John Staudenmayer; Rosalind J Wright
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2012-12-26
Journal Detail:
Title:  PloS one     Volume:  7     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2012  
Date Detail:
Created Date:  2013-01-09     Completed Date:  2013-06-27     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e52729     Citation Subset:  IM    
Affiliation:
Department of Psychology, Southern Methodist University, Dallas, Texas, United States of America. tritz@smu.edu
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MeSH Terms
Descriptor/Qualifier:
Facial Expression
Female
Heart Rate
Humans
Infant
Male
Respiratory Rate*
Stress, Psychological / physiopathology*
Vagus Nerve / physiopathology*
Grant Support
ID/Acronym/Agency:
K08 MH074588/MH/NIMH NIH HHS; R01 HL080674/HL/NHLBI NIH HHS; R01 HL089761/HL/NHLBI NIH HHS
Comments/Corrections

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