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Spatio-temporal measures of electrophysiological correlates for behavioral multisensory enhancement during visual,auditory and somatosensory stimulation:A behavioral and ERP study

查看全文 作　　者：Wuyi [1,2]Wang;Li [3]Hu;Hongyan [2]Cui;Xiaobo [2]Xie;Yong [2,4]Hu 高影响力作者 机构地区：[1]School of Precision Instruments and Opto-Electronics Engineering,Tianjin University;[2]Institute of Biomedical Engineering,Chinese Academy of Medical Science and Peking Union Medical College;[3]Key Laboratory of Cognition and Personality (Ministry of Education) and School of Psychology,Southwest University;[4]Department of Orthopaedics and Traumatology,the University of Hong Kong高影响力机构 出　　处：《Neuroscience Bulletin》索引2013年第29卷第6期,共10页高影响力期刊 基　　金：partly supported by the National Natural Science Foundation of China(81271685);Key Project of Science and Technology Fund of Tianjin Municipality,China(10JCZDJC16100);the China Postdoctoral Science Foundation(2012M510754);the Independent Innovative Fund of Tianjin University,Tianjin Municipality,China(1102) 摘　　要：Multisensory enhancement,as a facilitation phenomenon,is responsible for superior behavioral performance when an individual is responding to cross-modal versus modality-specific stimuli.However,the event-related potential(ERP)counterparts of behavioral multisensory enhancement are not well known.We recorded ERPs and behavioral data from 14 healthy volunteers with three types of target stimuli(modality-specific,bimodal,and trimodal)to examine the spatio-temporal electrophysiological characteristics of multisensory enhancement by comparing behavioral data with ERPs.We found a strong correlation between P3latency and behavioral performance in terms of reaction time(RT)(R=0.98,P<0.001),suggesting that P3 latency constitutes a temporal measure of behavioral multisensory enhancement.In addition,a fast RT and short P3 latency were found when comparing the modality-specific visual target with the modality-specific auditory and somatosensory targets.Our results indicate that behavioral multisensory enhancement can be identified by the latency and source distribution of the P3 component.These findings may advance our understanding of the neuronal mechanisms of multisensory enhancement. 关 键 词：行为表现 感官性能 电生理特性 ERP 视觉 时空 听觉 事件相关电位
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