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

作　　者：Wuyi Wang Li Hu Hongyan Cui Xiaobo Xie Yong Hu 

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

出　　处：《Neuroscience Bulletin》2013年第6期715-724,共10页神经科学通报（英文版）

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 P3 latency and behavioral performance in terms of reaction time（RT）（R = 0.98,P ＆lt;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.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 P3 latency and behavioral performance in terms of reaction time（RT）（R = 0.98,P ＆lt;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：multisensory enhancement temporal measure P3 latency visual dominance 

分 类 号：R318.0[医药卫生—生物医学工程]