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Nara Women's University Digital Information Repository > 040 大学院人間文化研究科 > 人間文化研究科年報 > 第20号 >

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タイトル: 事象関連電位からみた競争ストレスの影響について
その他のタイトル: The impact of competition stress on CNV and PINV
著者: 松本, 清; 佐久間, 春夫 link image
著者(別表記) : Matsumoto, Sayaka; Sakuma, Haruo
著者読み: まつもと, さやか; さくま, はるお
キーワード: 競争; ストレス; 事象関連電位; event-related potential; ERP; 随伴性陰性変動; contingent negative variation; CNV; 命令刺激後陰性変動; post-imperative negative variation; PINV; competition; stress
発行日: 2005年 3月31日
出版者: 奈良女子大学大学院人間文化研究科
引用: 人間文化研究科年報, 第20号, pp.277-287
抄録: Psychophysiological responses derived from competitive situation were examined by measuring contingent negative variation (CNV) and post-imperative negative variation(PINV). 15 undergraduate and graduate students, healthy females aged from 19 to 24, were served as subjects. CNV and PINV were induces with an audio-visual paradigm with a motor task. All subjects were engaged in the following experimental conditions: (I) control condition: completing solo the motor task; (II) competitive condition: competing with another competitor in reaction time (RT) of the same task. Only the result of winning or losing was presented every trial under competitive condition. Electroencephalograms (EEGs) were recorded from 11 sites at Fz, F3, F4, Cz, C3, C4, Pz, P3, P4, T3 and T4.The evoked potentials, following an auditory warning stimulus (S1) and a visual imperative stimulus (S2), were analyzed in three time segments: CNV and two adjacent PINV segments after S2 onset (PINV-1 and -2). The CNV amplitudes of losing trials under competitive condition were appeared to be smaller than those of control condition. These results indicate that preparation for imperative stimulus is not enough to respond as quickly as possible. the negativity of PINV-1 was higher in winning trials than in losing trials. These differences may be attributed to expectation of favorable result. In the PINV-2, second period of PINV, positive component was observed under competitive condition, and losing trials produces larger mean potentials than control condition. The positive component is supposed to reflect perceptual processes for next competition. The trends were seen especially at right central site. These findings suggest that competition stress may impact on CNV, and that the variation in potentials after imperative stimulus may reflect perceptual processes including evaluation for each trial and feedback to perform the next better response.
URI: http://hdl.handle.net/10935/328
ISSN: 0913-2201
出現コレクション:第20号

このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/10935/328

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