Wawrzyniak_et_al-2016-Psychophysiology.pdf (2.73 MB)
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Decreased reaction time variability is associated with greater cardiovascular responses to acute stress

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posted on 08.03.2016, 13:35 authored by Andrew J. Wawrzyniak, Mark Hamer, Andrew Steptoe, Romano Endrighi
Cardiovascular (CV) responses to mental stress are prospectively associated with poor CV outcomes. The association between CV responses to mental stress and reaction times (RTs) in aging individuals may be important but warrants further investigation. The present study assessed RTs to examine associations with CV responses to mental stress in healthy, older individuals using robust regression techniques. Participants were 262 men and women (mean age = 63.3 ± 5.5 years) from the Whitehall II cohort who completed a RT task (Stroop) and underwent acute mental stress (mirror tracing) to elicit CV responses. Blood pressure, heart rate, and heart rate variability were measured at baseline, during acute stress, and through a 75-min recovery. RT measures were generated from an ex-Gaussian distribution that yielded three predictors: mu-RT, sigma-RT, and tau-RT, the mean, standard deviation, and mean of the exponential component of the normal distribution, respectively. Decreased intraindividual RT variability was marginally associated with greater systolic (B = −.009, SE = .005, p = .09) and diastolic (B = −.004, SE = .002, p = .08) blood pressure reactivity. Decreased intraindividual RT variability was associated with impaired systolic blood pressure recovery (B = −.007, SE = .003, p = .03) and impaired vagal tone (B = −.0047, SE = .0024, p = .045). Study findings offer tentative support for an association between RTs and CV responses. Despite small effect sizes and associations not consistent across predictors, these data may point to a link between intrinsic neuronal plasticity and CV responses.

Funding

This research was supported by the British Heart Foundation RG/05/006 and RG/10/005/28296.

History

School

  • Sport, Exercise and Health Sciences

Published in

Psychophysiology

Citation

WAWRZYNIAK, A.J. ... et al, 2016. Decreased reaction time variability is associated with greater cardiovascular responses to acute stress. Psychophysiology, 53 (5), pp. 739-748.

Publisher

Published by Wiley Periodicals, Inc. on behalf of Society for Psychophysiological Research / © The Authors

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution(CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Publication date

2016

Notes

This is an open access article distributed under the terms of the Creative Commons Attribution License(http://creativecommons.org/licenses/by/4.0/), which permits use and distribution in any medium, provided the original work is properly cited.

ISSN

1540-5958

Language

en