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ISSN : 1226-9654

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Vol.21 No.4

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The Effect of Unilateral Hand Contractions on Contralateral Frontal Activity and Affective Experience

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2009, v.21 no.4, pp.283-298
https://doi.org/10.22172/cogbio.2009.21.4.003

(2009). The Effect of Unilateral Hand Contractions on Contralateral Frontal Activity and Affective Experience. The Korean Journal of Cognitive and Biological Psychology, 21(4), 283-298, https://doi.org/10.22172/cogbio.2009.21.4.003

Abstract

This study investigated the emotional function of frontal cortex asymmetry using unilateral hand contractions paradigm. Participants were randomly assigned to control, left-hand or right-hand contraction groups. Electroencephalogram(EEG) was recorded during 4 1-min baselines and two consecutive 45-s left or right hand contractions trial. Following the hand contraction practice trials, participants contracted the right or left hand during hearing the emotional news and EEG activity was also recorded. The results indicated that right-hand contractions produced greater left than right hemispheric activity, whereas left-hand contractions produced greater right than left hemispheric activity. Right-hand contractions increased positive emotional experience to both neutral and positive news editorial, compared to left-hand contraction. This results supported the hypothesis that the increase in relative left frontal cortical activation due to right-hand contraction was related to more self-reported positive affect. It was discussed that the mid-frontal asymmetry effect produced by the hand contraction manipulation is somewhat independent of the other asymmetry effects and the baseline asymmetry effect as affective traits.

keywords
unilateral hand contraction, electroencephalogram, emotional news, mid-frontal asymmetry, affective traits., 일측성 손 수축, 비대칭성, 긍정적 정서반응, 중전두피질영역, 정서특질

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