Hemispheric asymmetry for emotional stimuli detected with fMRI
作者:
Turhan Canli,
John Desmond,
Zuo Zhao,
Gary Glover,
John Gabrieli,
期刊:
NeuroReport
(OVID Available online 1998)
卷期:
Volume 9,
issue 14
页码: 3233-3239
ISSN:0959-4965
年代: 1998
出版商: OVID
关键词: Affect;Emotion;Human;Imaging;Laterality
数据来源: OVID
摘要:
CURRENT brain models of emotion processing hypothesize that positive (or approach-related) emotions are lateralized towards the left hemisphere, whereas negative (or withdrawal-related) emotions are lateralized towards the right hemisphere. Brain imaging studies, however, have so far failed to document such hemispheric lateralization. In a functional magnetic resonance imaging (fMRI) study, 14 female subjects viewed alternating blocks of emotionally valenced positive and negative pictures. When the experience of valence was equated for arousal, overall brain reactivity was lateralized towards the left hemisphere for positive pictures and towards the right hemisphere for negative pictures. This study provides direct support for the valence hypothesis, under conditions of equivalent arousal, by means of functional brain imaging.
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