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Heart‐rate and blood‐pressure variability during psychophysiological tasks involving speech: Influence of respiration
Author(s) -
Beda Alessandro,
Jandre Frederico C.,
Phillips David I.W.,
GiannellaNeto Antonio,
Simpson David M.
Publication year - 2007
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2007.00542.x
Subject(s) - heart rate variability , psychophysiology , psychology , respiration , heart rate , autonomic function , blood pressure , audiology , task (project management) , respiratory rate , autonomic nervous system , cardiology , medicine , neuroscience , management , economics , anatomy
Changes in heart‐rate and systolic arterial pressure variability (HRV and SAPV) indexes have been used in psychophysiology to assess autonomic activation, including during tasks involving speech. The current article clearly demonstrates in a sample of 25 adult subjects that the erratic and broadband respiratory patterns during such tasks violate the usual assumption that respiration is limited to the high‐frequency band (0.15–0.4 Hz). For these tasks, interindividual differences and rest–task changes in HRV and SAPV in the low‐frequency band (0.04–0.15 Hz) can be explained, to a large extent, by variations in the respiratory volume signal. This makes the use of HRV and SAPV as markers of autonomic function during these tasks highly questionable. Furthermore, a number of subjects with long respiratory period at rest were identified, whose presence in the sample can bias the estimation of baseline rest values.