The role of cardiopulmonary baroreceptors during the forearm vasodilatation response to mental stress

The forearm vasodilatation response to mental stress in humans is thought to be mediated by sympathetic withdrawal and β‐adrenergic mechanisms. However, the mechanisms of altered neural control during sympathetic withdrawal are unclear. Thus, cardiopulmonary baroreceptor activity in relation to symp...

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Bibliographic Details
Published in:Psychophysiology 2003-03, Vol.40 (2), p.249-253
Main Authors: Hamer, Mark, Boutcher, Yati N., Boutcher, Stephen H.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Cardiopulmonary baroreceptors
Cold pressor
Cold Temperature
Female
Forearm - blood supply
Forearm - physiology
Fundamental and applied biological sciences. Psychology
Heart - physiology
Humans
Lower Body Negative Pressure
Lung - physiology
Male
Mental challenge
Personality. Affectivity
Pressoreceptors - physiology
Pressure
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Regional Blood Flow - physiology
Space life sciences
Stress
Stress, Psychological - physiopathology
Sympathetic withdrawal
Vasodilatation
Vasodilation - physiology
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Summary:The forearm vasodilatation response to mental stress in humans is thought to be mediated by sympathetic withdrawal and β‐adrenergic mechanisms. However, the mechanisms of altered neural control during sympathetic withdrawal are unclear. Thus, cardiopulmonary baroreceptor activity in relation to sympathetic withdrawal during mental stress was examined. Forearm blood flow was measured during mental stress in males (n=18) during control and lower body negative pressure at −20 mmHg. Forearm blood flow was significantly increased during mental challenge; however, during lower body negative pressure the vasodilatation response was significantly attenuated in comparison with control. The results suggest the cardiopulmonary baroreceptors are involved with the sympathetic withdrawal response during forearm vasodilatation to mental stress.
ISSN:0048-5772
1469-8986
1540-5958
DOI:10.1111/1469-8986.00026