工作记忆对冲突性负波N270的影响  

The effects of working memory on the event-related potential N270

作　　者：欧阳取平[1] 王玉平[2] 

机构地区：[1]北京市顺义区医院中国医科大学北京顺义医院神经内二科,北京101300 [2]首都医科大学宣武医院神经内科

出　　处：《临床神经电生理学杂志》2008年第6期323-327,共5页Journal of Clinical Electroneurophysiology

摘　　要：目的:研究工作记忆对冲突性负波N270的影响。方法:实验中有数字—符号联想作业和数字—数字比较作业两种任务。实验中存在下面四种情况:①数字—符号对应;②数字—符号非对应;③数字—数字匹配;④数字—数字不匹配。呈现的第一个刺激(S1)为数字,随后呈现的第二个刺激(S2)为数字或符号,要求受试者判断S2是否与S1对应或匹配。结果:在冲突状态下,均可诱发出冲突性负波N270,且在数字—数字不匹配状态下比在数字—符号非对应状态下诱发出的N270波幅更负。结论:工作记忆负荷量的增大会影响冲突监测处理过程,从而相应地反映在N270波幅的变化上。Objective:To study the effects of working memory on the event-related potential N270. Method: The test included two tasks:the digit-symbol association and the digit-digit comparison.There were four types of stimulus pairs which were randomly presented to the subjects: ①The symbol (S2)was related with the digit (SI);②The symbol (S2) was notrelated with the digit (SI);③The second digit (S2) was matched with the first digit (S1);④The second digit (S2) was mismatched with the first digit (Si). Subjects were ask...

关 键 词：事件相关电位(ERP) N270 工作记忆 冲突监测处理 

分 类 号：R741[医药卫生—神经病学与精神病学]