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A Paced Auditory Serial Addition Task evokes stress and differential effects on masseter-muscle activity and haemodynamics.

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Title: A Paced Auditory Serial Addition Task evokes stress and differential effects on masseter-muscle activity and haemodynamics.
Authors: Tanosoto, Tomohiro Browse this author
Arima, Taro Browse this author →KAKEN DB
Tomonaga, Akio Browse this author
Ohata, Noboru Browse this author →KAKEN DB
Svensson, Peter Browse this author
Keywords: electromyography
heart rate variability
mental stress
myofascial pain
Issue Date: Aug-2012
Publisher: Wiley
Journal Title: European journal of oral sciences
Volume: 120
Issue: 4
Start Page: 363
End Page: 367
Publisher DOI: 10.1111/j.1600-0722.2012.00973.x
PMID: 22813228
Abstract: This study aimed to determine autonomic and jaw-muscle activities, and haemodynamic responses, to acute experimental mental stress in humans. Eleven healthy men (25.2 ± 3.0 years of age) and five healthy women (23.0 ± 3.7 years of age) performed a standardized mental stress task, the Paced Auditory Serial Addition Task (PASAT). Autonomic function, such as heart rate variability (HRV), and haemodynamic changes were recorded simultaneously. The success rate of the PASAT decreased with increased pace and duration. Low-frequency (5.8 ± 1.1 ms(2)) and high-frequency (5.3 ± 0.6 ms(2)) components of HRV decreased during the PASAT (to 5.0 ± 0.9 ms(2) and 4.6 ± 1.1 ms(2), respectively) as an indication of acute stress. Oxygenated haemoglobin in the masseter muscle (14.6 ± 2.2 10(4) units mm(-3)) remained at an elevated level during the PASAT (15.5 ± 2.5 10(4) units mm(-3)), whereas deoxygenated haemoglobin (7.8 ± 2.3 10(4) units mm(-3)) showed a consistent decrease (to 6.8 ± 2.1 10(4) units mm(-3)). Total haemoglobin and jaw-muscle electromyographic (EMG) activity did not change during the PASAT. Thus, PASAT-induced mental stress changed the parasympathetic/sympathetic balance of the heart and had an acute influence on jaw-muscle haemodynamics, but not on jaw-muscle EMG activity. This non-invasive experimental set-up can be applied to study the effects of repeated or longer-lasting mental stress in order to further the understanding of pathophysiological mechanisms in craniofacial pain conditions.
Rights: This is the pre-peer reviewed version of the following article: European Journal of Oral Sciences Volume 120, Issue 4, pages 363-367, August 2012, which has been published in final form at
Type: article (author version)
Appears in Collections:歯学院・歯学研究院 (Graduate School of Dental Medicine / Faculty of Dental Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 有馬 太郎

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