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冲突适应的神经振荡机制

DOI: 10.1360/052013-44, PP. 992-1002

Keywords: 冲突适应,冲突观察,脑电,时频分析,Flanker任务

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Abstract:

靶刺激和干扰刺激的不一致性会造成人类的行为冲突.特别地,连续的冲突情境能诱发大脑对冲突的适应.然而,目前的研究结果还不能清楚地阐释冲突适应的认知和神经机制.为了考察冲突适应的神经振荡过程,采用冲突观察实验范式,记录了15个健康成人被试在完成字母Flanker任务时的行为和脑电数据.对EEG数据进行时频分析,结果揭示了冲突适应的神经振荡机制.在观察任务中,对于不一致条件,α频带(9~13Hz,480~980ms)在左前额叶和中前区展现了显著的事件相关异步性(ERD);对于一致条件,α频带在这些区域展现了显著的事件相关同步性(ERS).在反应任务中,θ频带(6~8Hz,50~1000ms)的ERS在左前额叶和中前区表现为iI

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