研究者詳細 - 大平　英樹

In the present study, we investigated the gamma band response and its phase synchrony between electrodes in alexithymia, which is characterized by a disability in identifying and describing feelings. Individuals with high and low alexithymia scores were selected according to the scores on the 20-item Toronto Alexithymia Scale. EEG was recorded from alexithymic and nonalexithymic persons viewing emotionally negative or neutral stimuli. Nonalexithymic persons exhibited increased gamma band power and phase synchronization at the 400-450-ms time window when processing emotionally negative stimuli. Neither enhanced gamma band power nor phase synchronization was observed in alexithymic persons in the negative emotion condition. These results suggest that gamma band activity reflects emotional processing, and alexithymic persons may have a deficit in communication between brain regions or in the utilization of memory or emotional information during the processing of emotional stimuli. Copyright © 2006 Society for Psychophysiological Research.

DOI： 10.1111/j.1469-8986.2006.00461.x

Web of Science

Scopus

PubMed

その他リンク： http://orcid.org/0000-0002-5576-4791

The phylogeny of eyeblink behaviors in primates

Tada Hideoki, Omori Yasuko, Hirokawa Kumi, Ohira Hideki, Tomonaga Masaki

INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY 61 巻 ( 3 ) 頁： 339 - 339 2006年9月

Temporal redistribution of NK cell subsets during acute psychological stressor

Kimura K., Isowa T., Ohira H.

JOURNAL OF NEUROIMMUNOLOGY 178 巻頁： 178 - 179 2006年9月

Influence of emotion regulation on the immune, autonomic responses, and cognition

Murakami H., Ohira H.

JOURNAL OF NEUROIMMUNOLOGY 178 巻頁： 182 - 183 2006年9月

Effect of attraction to the favorite person on innate immune system

Matsunaga, M; Yamauchi, T; Konagaya, T; Ohira, H

JOURNAL OF NEUROIMMUNOLOGY 178 巻頁： 178 - 178 2006年9月

Appraisal about controllability of acute stressor and brain-cardiac-immune association

Ohira, H; Isowa, T; Nomura, M; Ichikawa, N; Kimura, K; Miyakoshi, M; Iidaka, T; Fukuyama, S; Nakajima, T; Yamada, J

JOURNAL OF NEUROIMMUNOLOGY 178 巻頁： 177 - 177 2006年9月

活気を高めるポジティブ感情が免疫系に及ぼす効果

松永昌宏, 大平英樹

生理心理学と精神生理学 24 巻 ( 2 ) 頁： 212 - 212 2006年8月

Differences in relaxation by means of guided imagery in a healthy community sample 査読有り

E Watanabe, S Fukuda, H Hara, Y Maeda, H Ohira, T Shirakawa

ALTERNATIVE THERAPIES IN HEALTH AND MEDICINE 12 巻 ( 2 ) 頁： 60 - 66 2006年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：INNOVISION COMMUNICATIONS

Objective center dot This study investigated differences in relaxation induced by guided imagery in healthy community samples.
Methods center dot One hundred forty-eight people took part in our investigation. The mean age of the 50 males and 98 females was 39.36 +/- 11.86 years. We took saliva samples to measure salivary cortisol (SC) before the first session, after the first session, and after the second session. Subjects were asked to complete the short form of the Multiple Mood Scale (MMS) questionnaire before the first session and after the second session. The shortened form of Betts' Questionnaire upon Mental Imagery (QMI) was collected once before the first session, and vividness of the imagery was measured using a visual analogue scale once after the second session.
Results center dot SC levels were significantly decreased after the first session and after the second session in all participants. We found, most significantly, that age and QMI scores were strongly related to changes in SC level throughout the relaxation sessions.
Conclusions center dot Unpleasant information, a cause of mental stress, is replaced by a comfortable image, and this replacement affects a participant's SC level. The greater one's imagery ability is, the more successful the displacement of stress and the shift toward a comfortable mental and emotional state will be. This study provides a basis for explaining the mechanism through which relaxation by means of guided imagery is effective in reducing stress.

Web of Science

Differences in relaxation by means of guided imagery in a healthy community sample

Watanabe E., Fukuda S., Hara H., Maeda Y., Ohira H., Shirakawa T.

Alternative Therapies in Health and Medicine 12 巻 ( 2 ) 頁： 60 - 66 2006年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Alternative Therapies in Health and Medicine

Objective: This study investigated differences in relaxation induced by guided imagery in healthy community samples. Methods: One hundred forty-eight people took part in our investigation. The mean age of the 50 males and 98 females was 39.36 ± 11.86 years. We took saliva samples to measure salivary cortisol (SC) before the first session, after the first session, and after the second session. Subjects were asked to complete the short form of the Multiple Mood Scale (MMS) questionnaire before the first session and after the second session. The shortened form of Betts' Questionnaire upon Mental Imagery (QMI) was collected once before the first session, and vividness of the imagery was measured using a visual analogue scale once after the second session. Results: SC levels were significantly decreased after the first session and after the second session in all participants. We found, most significantly, that age and QMI scores were strongly related to changes in SC level throughout the relaxation sessions. Conclusions: Unpleasant information, a cause of mental stress, is replaced by a comfortable image, and this replacement affects a participant's SC level. The greater one's imagery ability is, the more successful the displacement of stress and the shift toward a comfortable mental and emotional state will be. This study provides a basis for explaining the mechanism through which relaxation by means of guided imagery is effective in reducing stress.

Scopus

Association of neural and physiological responses during voluntary emotion suppression.

Ohira H, Nomura M, Ichikawa N, Isowa T, Iidaka T, Sato A, Fukuyama S, Nakajima T, Yamada J

NeuroImage 29 巻 ( 3 ) 頁： 721 - 33 2006年2月

Association of neural and physiological responses during voluntary emotion suppression

Ohira H, Nomura M, Ichikawa N, Isowa T, Iidaka T, Sato A, Fukuyama S, Nakajima T, Yamada J

NEUROIMAGE 29 巻 ( 3 ) 頁： 721 - 733 2006年2月

Association of neural and physiological responses during voluntary emotion suppression

Ohira H., Nomura M., Ichikawa N., Isowa T., Iidaka T., Sato A., Fukuyama S., Nakajima T., Yamada J.

NeuroImage 29 巻 ( 3 ) 頁： 721 - 733 2006年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：NeuroImage

Recent neuroimaging studies have shown that several prefrontal regions play critical roles in inhibiting activation of limbic regions during voluntary emotion regulation. The present study aimed to confirm prior findings and to extend them by identifying the frontal neural circuitry associated with regulation of peripheral physiological responses during voluntary emotion suppression. Ten healthy female subjects were presented with affectively positive, neutral, and negative pictures in each of an Attending and Suppression task. Regional cerebral blood-flow changes were measured using 15O-water positron emission tomography, and autonomic (heart rate: HR, skin conductance response: SCR) and endocrine (adrenocorticotropic hormone: ACTH) indices were measured during both tasks. The left amygdala and the right anterior temporal pole were activated during the Attending task, whereas activation was observed in the left lateral prefrontal cortex (LPFC), including the adjacent medial prefrontal cortex (MPFC), and medial orbitofrontal cortex (MOFC) during the Suppression task. In the Attending task, activation in the amygdala and MOFC positively correlated with magnitudes of the SCR and ACTH responses. Emotion suppression elicited enhancement of SCR and the strength of the effect positively correlated with activation in the MOFC. These results suggest that the MOFC plays a pivotal role in top-down regulation of peripheral physiological responses accompanying emotional experiences. © 2005 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.neuroimage.2005.08.047

Scopus

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