@phdthesis{oai:ir.kagoshima-u.ac.jp:00015244,
 author = {福嶋, 美佳 and Fukushima, Mika},
 month = {2021-05-06, 2021-05-06, 2020-08-19, 2020-08-19},
 note = {博士論文全文, 博士論文要旨, 最終試験結果の要旨, 論文審査の要旨, Background: Gastroesophageal reflux disease may be an important risk factor for awake bruxism. Additionally, it has been known that a psychological stress task affects masseter muscle activity, and autonomic nervous system (ANS) activity modulation induces masseter muscle activity.
Objectives: This study aimed to investigate whether task-induced stress and experimental esophageal acid infusion increase masseter muscle activity and alter ANS activity, compared to rest task and esophageal saline infusion, respectively.
Methods: Polygraphic monitoring, consisting of electromyography of the masseter muscle and electrocardiography was performed in 12 healthy adult men during 30-min interventions with intra-esophageal saline or acid infusion, while reading a book quietly, as rest, and while performing calculation, as a stress task.
Results: At rest, masseter muscle activity and parasympathetic nervous system (PNS) activity during acid infusion was significantly higher (P=0.019) and lower (P=0.021) than during saline infusion, respectively. During saline infusion, both masseter muscle activity and sympathetic nervous system (SNS) activity or PNS activity while performing the calculation task were higher (P = 0.022 and 0.012, respectively) or lower (P = 0.007) than those during the reading task, respectively. In two-way repeated-measures ANOVA, intra-esophageal infusion (saline or acid) significantly affected masseter muscle activity (P=0.008) and PNS activity (P=0.021). However, performing tasks (reading or calculation) significantly affected only PNS activity (P= 0.028).
Conclusion: Intra-esophageal acid infusion significantly increased masseter muscle activity and decreased PNS activity. In contrast, stress task significantly decreased PNS activity, but only modestly increased masseter muscle activity and SNS activity.

ACCEPTED VERSION
This is the peer reviewed version of the following article:
Aya Maeda‐Iino, Mika Fukushima, Yoko Sakoguchi, Haruhito Omure, Akihito Oishi, Yasuhiko Oga, Minami Furukawa‐Sainoki, Shuji Kanmura, Akio Ido, Shouichi Miyawaki
Effects of intra-esophageal acid infusion and a stress task on masseter muscle activity and autonomic nervous activity in wakefulness
Journal of Oral Rehabilitation (2020), 47(5), 567-576
© 2020 John Wiley & Sons Ltd
which has been published in final form at  https://doi.org/10.1111/joor.12947
This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.},
 school = {鹿児島大学},
 title = {Effects of intra-esophageal acid infusion and a stress task on masseter muscle activity and autonomic nervous activity in wakefulness},
 year = {},
 yomi = {フクシマ, ミカ}
}