Hemispheric lateralization of cerebral blood-flow changes during selective listening to dichotically presented continuous speech

被引:36
作者
Alho, K
Vorobyev, VA
Medvedev, SV
Pakhomov, SV
Roudas, MS
Tervaniemi, M
van Zuijen, T
Näätänen, R
机构
[1] Univ Helsinki, Dept Psychol, Cognit Brain Res Unit, FIN-00014 Helsinki, Finland
[2] Univ Helsinki, Dept Psychol, Gen Psychol Div, FIN-00014 Helsinki, Finland
[3] Univ Turku, Dept Psychol, Turku, Finland
[4] Russian Acad Sci, Inst Human Brain, St Petersburg 196140, Russia
[5] Helsinki Brain Res Ctr, Helsinki, Finland
来源
COGNITIVE BRAIN RESEARCH | 2003年 / 17卷 / 02期
基金
芬兰科学院;
关键词
attention; speech perception; auditory cortex; PET;
D O I
10.1016/S0926-6410(03)00091-0
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
Regional cerebral blood flow (rCBF) was measured with positron emission tomography (PET) while subjects were selectively listening to continuous speech delivered to one ear and ignoring concurrent speech delivered to the opposite ear, as well as concurrent text or letter strings running on a screen. rCBF patterns associated with selective listening either to the left-ear or right-ear speech message were compared with each other and with rCBF patterns in two visual-attention conditions in which the subjects ignored both speech messages and either read the text or discriminated the meaningless letter strings moving on the screen. Attention to either speech message was associated with enhanced activity in the superior temporal cortex of the language-dominant left hemisphere, as well as in the superior and middle temporal cortex of the right hemisphere suggesting enhanced processing of prosodic features in the attended speech. Moreover, enhanced activity during attention to either speech message was observed in the right parietal areas known to have an important role in directing spatial attention. Evidence was also found for attentional tuning of the left and right auditory cortices to select information from the contralateral auditory hemispace. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:201 / 211
页数:11
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