脑电成分CNV-LRP-SPN简介.pptx

《脑电成分CNV-LRP-SPN简介.pptx》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、CNVFRN——奖赏加工相关的两个ERP成分及LRPContingentNegativeVariation(CNV)01Lateralizedreadinesspotential(LRP)02FeedbackRelatedNegativity(SPN)03CONTENT1关联性负变CNVNoTask:ClickonlyNoTask:FlashesonlyNoTask:ClickfollowedbyflashesTask:PressbuttonwhenflashesstartCNVS2S1(Walteretal

2、.,Nature,1964)S1：条件刺激S2：非条件刺激学习与记忆的神经基础Atleast2componentscancontributetotheCNVlatewave.(Ruchkinetal.,1986;BruniaandHaagh,1986)Thefirstwaveisrelatedtothewarningstimulus(WS):ReadinessPotential(RP)Thesecondtothemovementtobemadefollowingtheresponsestimulus(RS):

3、Stimulus-PrecedingNegativity(SPN)BackgroundPressKnowledgeofResults(KR)PressIMT<20sIMT>22s20s≤IMT≤22s2sinter-movementtime(IMT)estimate2sDistributionofslowbrainpotentialsrelatedtomotorpreparationandstimulusanticipationinatimeestimationtask,Bruniaetal.,1988Pro

4、cedureExpI:C3’,C4’,C3’’,C4’’,P3,P4ExpII:Fp1,Fp2,F3,F4,C3’,C4’C3',C4':1cmanteriortoC3orC4.(motorcortex)C3",C4’’:2cmposteriortoC3andC4.(somatosensorycortex)ConditionI:lefthandConditionII:righthandDesignExpIExpII2Bereitschaftspotentiai,BPReadinesspotential,RPL

5、ateralizedreadinesspotential,LRPLRPKornhuber&Deeckes,1965BereitschaftspotentiaiReadinesspotentialColes,1988Lateralizedreadinesspotential应用运动准备和反应执行阈下知觉和内隐学习西蒙效应3反馈相关负波FRN概念是由代表行为错误或失去金钱等负性反馈刺激诱发的一种脑电波成分出现在刺激呈现后250~300ms左右偶极子源定位发现这一成分产生于前扣带回附近(ACC)定义Onset发生源

6、理论解释时间估计任务FRN反映的是神经系统对反馈刺激的认知加工过程简单赌博任务FRN反映的是对情绪动机意义的评价过程强化学习理论情绪动机假说Gehringetal.,2002Holroydetal.,2002