著者

赤枝 建夫 浅川 徹也 多屋 優人 横山 浩之 林 拓世 水野(松本) 由子

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.51, no.2, pp.89-94, 2013-04-10 (Released:2013-09-10)

参考文献数

21

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The objective of this research is to evaluate autonomic nervous function in Holter Electrocardiogram (ECG) using smartphone under the emotional stimuli. Twenty-four healthy subjects were assessed using State Trait Anxiety Inventory (STAI) and divided into two groups:high anxiety group and low anxiety group. ECG was measured under emotionally audio-visual stimuli (relax, pleasant, and unpleasant stimuli) and emotional sentence stimuli (pleasant sentence and un-pleasant sentence stimuli) using smartphone. The RR interval from ECG was analyzed for estimating the HF% and LF/HF values. The HF% and LF/HF values among stimuli and between groups were compared using analysis of variance (ANOVA) and t-test, respectively. The LF/HF values of pleasant, unpleasant, pleasant sentence, and unpleasant sentence stimuli were significantly higher than the value of relax stimuli. The LF/HF value of unpleasant stimuli in low anxiety group was significantly higher than the value in high anxiety group. This research suggests that the autonomic nervous function would be different based on the emotional stimuli and the presence of anxiety.

著者

水野 (松本) 由子 田中 康仁 林 拓世 岡本 永佳 西村 治彦 稲田 紘

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.48, no.1, pp.11-24, 2010-02-10 (Released:2010-11-17)

参考文献数

32

被引用文献数

8

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The aim of this research was to assess the physiological signals which were relevant working efficiency under mental workload. Eleven healthy subjects were examined. In the first step, their mood status and stress level were evaluated with questionnaire methods:“Profile of Mood States (POMS)” and “Stress Self Rating Scale (SSRS)”, respectively. In the second step, electroencephalography (EEG) and photoplethysmography under the mental workload tasks in four auditory stimuli (silent circumstance, white noise, classical music, and up-tempo music) were measured. The mental workload tasks consisted of two parts:performing Uchida-Kraepelin test (calculating task:CAL) on PC monitor in two minutes and fixating on a crosshair image (after CAL) in two minutes. A procedure of the mental workload task in each auditory stimulus was repeated three times. EEG data were analyzed using a discrete Fourier transform to obtain power spectral density (PSD) in theta, alpha, and beta bands. Pulse waves from photoplethysmography were analyzed for estimating the pulse wave amplitude (PWA) and length (PWL). PSDs of theta band in silent circumstance and classical music under and after CALs, alpha band in classical music under and after CALs, and beta band in up-tempo music under CAL on most or all areas were significantly larger than those in the other auditory stimuli. The results of photoplethysmography analysis showed that changes of PWA and PWL in silent circumstance and classical music were more stable than those in the other auditory stimuli. It was suggested that the classical music would not only affect brain activity under the mental workload and augment the efficiency of it, but also facilitate recovery of the physiological conditions from the stressful situations. These events from the physiological point of view showed that working environments could be considered to avoid adding stress on the brain function and autonomic nervous system during and even after the tasks.

著者

水野(松本) 由子 小室 寛子 小縣 拓也 浅川 徹也 林 拓世

出版者

一般社団法人 日本臨床神経生理学会

雑誌

臨床神経生理学 (ISSN:13457101)

巻号頁・発行日

vol.40, no.2, pp.61-72, 2012-04-01 (Released:2014-08-20)

参考文献数

34

被引用文献数

2

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情動ストレス刺激直後における脳波の経時的変化を定量的に評価した。被験者は健常成人22名で, 心身状態をCornell Medical Index (以降, CMI) を用いて評価し, 領域I を健常群, 領域II, III, IVをCMI 高値群に分類した。被験者には, 安静, 快, 不快の視聴覚動画像刺激を提示し, 180 秒間にわたって脳波を測定した。十分な休息を挟みながら, 各刺激提示を3試行, ランダムな順序で実施した。1試行180 秒間のうち, アーチファクトを除いた152 秒間について, α帯域の平均スケログラム値 (ウェーブレットスペクトル値) を求め, 3試行分の平均値について, 測定部位ごとに, 刺激間, 被験者間の比較を行った。さらに, 実験開始前の安静閉眼の無負荷状態を基準値とし, 4 秒ごとの相対平均スケログラム値を求め, 刺激後の経時的変化を回帰分析を用いて定量化した。その結果, 健常群ではCMI 高値群と比較して, 情動刺激に対する反応が大きく鋭敏であった。健常群のスケログラム値は, 安静刺激では無負荷状態と同値に近づき, 不快刺激では増加した。心身状態の違いにより, 情動ストレス負荷後の脳波の経時的変化に違いがみられた。

著者

鴨 宏一 村松 歩 多屋 優人 横山 浩之 浅川 徹也 林 拓世 水野(松本) 由子

出版者

一般社団法人 日本臨床神経生理学会

雑誌

臨床神経生理学 (ISSN:13457101)

巻号頁・発行日

vol.41, no.4, pp.193-201, 2013-08-01 (Released:2013-11-01)

参考文献数

22

被引用文献数

2

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本研究では携帯端末による情動刺激下での脳波を用いた脳機能の評価を目的とした。被験者は健常成人24 名で,Cornell Medical Index(CMI),日本版State-Trait Anxiety Inventory(STAI),簡易ストレス度チェックリスト(SCL)によって心身状態を評価し,心理検査低値群と心理検査高値群に分類した。情動刺激は,情動的視聴覚セッション(安静,快,不快)と情動的文章セッション(快文章,不快文章)を用意し,携帯端末からの視聴覚刺激として被験者に提示し,脳波を計測した。脳波は離散フーリエ変換を行い,パワースペクトル値を算出した。α2 帯域の結果から,心理検査高値群は不快刺激および不快文章刺激時に側頭部でスペクトル値が高値を示した。以上より,携帯端末による情動刺激が精神安定度と関連して,脳機能の反応に影響を及ぼすことが示唆された。

著者

林 拓世@水野

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

電子情報通信学会論文誌 D (ISSN:18804535)

巻号頁・発行日

vol.J91-D, no.7, pp.1874-1885, 2008-07-01

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日常生活からのストレスは慢性化しやすく,時に重大な疾病を引き起こすが,評価方法については未発達段階である.本研究では,情動ストレス負荷時における生理学的信号解析として,脳機能と自律神経機能の客観的評価を行った.被験者は健常成人22名とし,大学生用ストレス自己評価尺度によりストレス群と非ストレス群に分類した.測定には脳波と心電図を用い,情動ストレス負荷として安静刺激,快刺激,不快刺激の視聴覚動画像刺激を用いた.脳波周波数解析の結果,両群ともに不快刺激は安静刺激及び快刺激と比較して,相対パワースペクトル値が高値を示した.更に不快刺激は,ストレス群では相対パワースペクトル値が有意に経時的減少を示し,非ストレス群では有意な一時的,または継続的な増加を示した.自律神経機能では,非ストレス群はストレス群と比較して反応性がより高く,特に非ストレス群では安静刺激は他の刺激と比較して副交感神経機能が有意に高かった.これらのことから,ストレスと脳機能の間に関連性が示され,更にストレス時における脳機能活動は生体抵抗性と類似した傾向を示すことが分かった.

著者

吉田 直浩 浅川 徹也 林 拓世 水野 (松本) 由子

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.49, no.1, pp.91-99, 2011-02-10 (Released:2011-12-13)

参考文献数

30

被引用文献数

4

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The aim of this research was to evaluate the autonomic nervous reaction using photoploethysmography under the emotional stimuli. Twenty healthy adults (11 males and 9 females) with a mean age of 25.0±5.0 were assessed for their psychosomatic states using Cornell Medical Index (CMI) and classified into two groups: group I (healthy) and II-IV (neurotic tendency). The photoplethysmography under emotional stimuli using the audiovisual video footages for 40 seconds and during recalling the contents of the footages soon after the stimuli for 180 seconds was measured. These series were repeated three times. The emotional stimuli consisted of "positive stimuli" and "negative stimuli". The "positive stimuli" such as relaxed and pleasant stimuli could evoke a positive feeling, while the "negative stimuli" such as unpleasants #1 (human-relation problem) and #2 (fear) stimuli could evoke a negative feeling. Pulse waves from photoplethysmography were analyzed for estimating the pulse wave amplitude, reflection index (RI). and pulse wave length, and these values of two groups were compared using analysis of variance (ANOVA). The results showed that the pulse wave amplitudes of group I under and after the positive simuli were significantly larger than the amplitudes under and after the negative stimuli, respectively. On the other hand, there was no obvious difference of the pulse wave amplitudes of group II-IV between the positive and negative stimuli. RI of group I during and before the stimuli was smaller than the base line, and RI under the unpleasant #2 stimuli was smallest in all the stimuli. However, RI of group II-IV under the unpleasant #2 stimuli was largest in all the stimuli. The pulse wave length under the unpleasant #1 stimuli was significantly larger than the other stimuli, and the pulse wave length after the stimuli was significantly smaller than the base line. These results suggested that the autonomic nervous reaction under emotional stimuli would be regulated based on the psychosomatic states.

著者

水野 松本 由子 田中 康仁 林 拓世 岡本 永佳 西村 治彦 稲田 紘

出版者

一般社団法人 日本生体医工学会

雑誌

生体医工学 : 日本エム・イー学会誌 = Transactions of the Japanese Society for Medical and Biological Engineering : BME (ISSN:1347443X)

巻号頁・発行日

vol.48, no.1, pp.11-24, 2010-02-10

参考文献数

32

被引用文献数

2

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The aim of this research was to assess the physiological signals which were relevant working efficiency under mental workload. Eleven healthy subjects were examined. In the first step, their mood status and stress level were evaluated with questionnaire methods:“Profile of Mood States (POMS)” and “Stress Self Rating Scale (SSRS)”, respectively. In the second step, electroencephalography (EEG) and photoplethysmography under the mental workload tasks in four auditory stimuli (silent circumstance, white noise, classical music, and up-tempo music) were measured. The mental workload tasks consisted of two parts:performing Uchida-Kraepelin test (calculating task:CAL) on PC monitor in two minutes and fixating on a crosshair image (after CAL) in two minutes. A procedure of the mental workload task in each auditory stimulus was repeated three times. EEG data were analyzed using a discrete Fourier transform to obtain power spectral density (PSD) in theta, alpha, and beta bands. Pulse waves from photoplethysmography were analyzed for estimating the pulse wave amplitude (PWA) and length (PWL). PSDs of theta band in silent circumstance and classical music under and after CALs, alpha band in classical music under and after CALs, and beta band in up-tempo music under CAL on most or all areas were significantly larger than those in the other auditory stimuli. The results of photoplethysmography analysis showed that changes of PWA and PWL in silent circumstance and classical music were more stable than those in the other auditory stimuli. It was suggested that the classical music would not only affect brain activity under the mental workload and augment the efficiency of it, but also facilitate recovery of the physiological conditions from the stressful situations. These events from the physiological point of view showed that working environments could be considered to avoid adding stress on the brain function and autonomic nervous system during and even after the tasks.