Exploring the possible mechanisms of blunted cardiac reactivity to acute psychological stress

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@article{ff6f81a4068d498c8993ce039a5064a5,
title = "Exploring the possible mechanisms of blunted cardiac reactivity to acute psychological stress",
abstract = "Blunted cardiovascular reactivity to acute psychological stress has been linked to a range of adverse health and behavioral outcomes. However, the origins of blunted reactivity remain unclear. The current study aimed to explore the following possibilities: different appraisals of task stressfulness and/or difficulty, diminished task effort, or reduced physiological capacity to respond. Individuals characterized, via pre-screening, as blunted (n = 17) or exaggerated (n = 16) heart rate (HR) reactors to acute psychological stress (socially evaluative mental arithmetic) were exposed to a psychological stress, cold pressor and exercise tasks during a follow-up testing session while HR and blood pressure (BP) were measured. At follow-up, groups again mounted significantly different HR reactions to psychological stress, despite reporting similar levels of subjective stress and difficulty, and achieving similar tasks scores (measure of task effort) at both testing sessions. In response to the cold pressor and exercise blunted and exaggerated reactors displayed similar HR and BP responses. Results indicated that blunted reactors do not differ from exaggerated reactors on appraisals of task stressfulness or difficulty, or objective task effort, and do possess the physiological capacity to respond to other laboratory challenges. Other sources of blunted stress reactivity remain to be explored.",
keywords = "Stress , Cardiovascular reactivity , Perceptions , Blunted , Exaggerated",
author = "Brindle, {Ryan C.} and Anna Whittaker and Adam Bibbey and Douglas Carroll and Ginty, {Annie T.}",
year = "2017",
month = "3",
day = "1",
doi = "10.1016/j.ijpsycho.2016.12.011",
language = "English",
volume = "113",
pages = "1--7",
journal = "International journal of psychophysiology : official journal of the International Organization of Psychophysiology",
issn = "0167-8760",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Exploring the possible mechanisms of blunted cardiac reactivity to acute psychological stress

AU - Brindle, Ryan C.

AU - Whittaker, Anna

AU - Bibbey, Adam

AU - Carroll, Douglas

AU - Ginty, Annie T.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Blunted cardiovascular reactivity to acute psychological stress has been linked to a range of adverse health and behavioral outcomes. However, the origins of blunted reactivity remain unclear. The current study aimed to explore the following possibilities: different appraisals of task stressfulness and/or difficulty, diminished task effort, or reduced physiological capacity to respond. Individuals characterized, via pre-screening, as blunted (n = 17) or exaggerated (n = 16) heart rate (HR) reactors to acute psychological stress (socially evaluative mental arithmetic) were exposed to a psychological stress, cold pressor and exercise tasks during a follow-up testing session while HR and blood pressure (BP) were measured. At follow-up, groups again mounted significantly different HR reactions to psychological stress, despite reporting similar levels of subjective stress and difficulty, and achieving similar tasks scores (measure of task effort) at both testing sessions. In response to the cold pressor and exercise blunted and exaggerated reactors displayed similar HR and BP responses. Results indicated that blunted reactors do not differ from exaggerated reactors on appraisals of task stressfulness or difficulty, or objective task effort, and do possess the physiological capacity to respond to other laboratory challenges. Other sources of blunted stress reactivity remain to be explored.

AB - Blunted cardiovascular reactivity to acute psychological stress has been linked to a range of adverse health and behavioral outcomes. However, the origins of blunted reactivity remain unclear. The current study aimed to explore the following possibilities: different appraisals of task stressfulness and/or difficulty, diminished task effort, or reduced physiological capacity to respond. Individuals characterized, via pre-screening, as blunted (n = 17) or exaggerated (n = 16) heart rate (HR) reactors to acute psychological stress (socially evaluative mental arithmetic) were exposed to a psychological stress, cold pressor and exercise tasks during a follow-up testing session while HR and blood pressure (BP) were measured. At follow-up, groups again mounted significantly different HR reactions to psychological stress, despite reporting similar levels of subjective stress and difficulty, and achieving similar tasks scores (measure of task effort) at both testing sessions. In response to the cold pressor and exercise blunted and exaggerated reactors displayed similar HR and BP responses. Results indicated that blunted reactors do not differ from exaggerated reactors on appraisals of task stressfulness or difficulty, or objective task effort, and do possess the physiological capacity to respond to other laboratory challenges. Other sources of blunted stress reactivity remain to be explored.

KW - Stress

KW - Cardiovascular reactivity

KW - Perceptions

KW - Blunted

KW - Exaggerated

U2 - 10.1016/j.ijpsycho.2016.12.011

DO - 10.1016/j.ijpsycho.2016.12.011

M3 - Article

VL - 113

SP - 1

EP - 7

JO - International journal of psychophysiology : official journal of the International Organization of Psychophysiology

JF - International journal of psychophysiology : official journal of the International Organization of Psychophysiology

SN - 0167-8760

ER -