Effect of anticipation triggered by a prior dyspnea experience on brain activity
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- Nakai Hideki
- Department of Rehabilitation, Higashi Osaka Hospital: 1-7-22 Jyoutoku, Osaka city, Osaka 536-0005, Japan
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- Tsujimoto Kengo
- National Institute for Physiological Sciences, Japan
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- Fuchigami Takeshi
- Department of Rehabilitation, Okuma Central Hospital, Japan
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- Ohmatsu Satoko
- Department of Neurorehabilitation, Graduate School of Health Science, Kio University, Japan
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- Osumi Michihiro
- Department of Neurorehabilitation, Graduate School of Health Science, Kio University, Japan
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- Nakano Hideki
- Department of Neurorehabilitation, Graduate School of Health Science, Kio University, Japan
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- Fukui Manami
- Department of Rehabilitation Medicine, Higashi Osaka Hospital, Japan
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- Morioka Shu
- Department of Neurorehabilitation, Graduate School of Health Science, Kio University, Japan
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[Purpose] Oxygenated hemoglobin (oxy-Hb) concentrations in the prefrontal cortex are closely associated with dyspnea. Dyspnea is influenced not only by physical activity, but also by visual stimuli, and several studies suggest that oxy-Hb concentrations change in response to certain external stimuli. However, the effects of internal psychological states on dyspnea have not been reported. This study explored the influence of anticipation triggered by previous episodes of dyspnea on brain activity. [Subjects] The subjects were 15 healthy volunteers with a mean age of 25.0 ± 3.0 years. [Methods] The subjects were shown a variety of photographs and instructed to expect breathing resistance matched to the affective nature of the particular photograph. After viewing the images, varying intensities of breathing resistance that were identical to, easier than, or harder than those shown in the images were randomly administered to the subjects; in fact, the image and resistance were identical 33% of the time and discordant 66% of the time. [Results] The concentrations of oxy-Hb in the right medial prefrontal cortex (rMPFC) increased significantly with an inspiratory pressure that was 30% of the maximum intensity in the subjects shown a pleasant image compared to the concentrations in subjects shown an unpleasant image. Moreover, rMPFC activity was significantly correlated with the magnitude of the dyspnea experienced. [Conclusion] These results suggest that a correlation exists between increased oxy-Hb in the rMPFC and the effects of expectations on dyspnea.
収録刊行物
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- J Phys Ther Sci
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J Phys Ther Sci 27 (3), 635-639, 2015
理学療法科学学会
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詳細情報 詳細情報について
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- CRID
- 1390001204331319680
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- NII論文ID
- 130005061616
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- ISSN
- 21875626
- 09155287
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可