冲突监控中兴奋与抑制过程的事件相关电位N450的研究
Event-related potential N450 study on excitement and inhibition in conflict monitoring
王爱莉 1贾美雪 1随力1
作者信息
- 1. 上海理工大学 健康科学与工程学院,上海 200093
- 折叠
摘要
为探讨健康人执行Stroop变式(字义-时长)任务时,冲突监控过程中兴奋与抑制对事件相关电位N450 的影响.本研究选取了 46 名本科生随机分配至时长估计任务组(n=22)和一致性判断任务组(n=24),分别诱发字义的抑制及字义的兴奋与抑制,对两组在两种条件下(字义-时长判断冲突与不冲突)的行为数据和事件相关电位N450 进行研究.结果发现:(1)两组冲突条件下,反应时显著增加;在时长估计任务组中,冲突条件下正确率显著下降(P<0.05);(2)仅诱导字义的抑制,冲突与不冲突条件下N450 波幅无显著差异;同时诱导字义的抑制与兴奋,冲突与不冲突条件下N450 波幅有显著差异(P<0.05);(3)sLORETA溯源结果表明,冲突处理与扣带回和额顶叶网络被激活有关.研究表明,刺激冲突时被试的反应会受到显著影响,事件相关电位N450 与刺激的兴奋与抑制过程有关.
Abstract
To investigate the effects of excitation and inhibition on N450 during conflict monitoring in healthy subjects doing the Stroop variant(word sense-duration task).46 undergraduate students were chosen and randomly assigned to the duration estimation task group(n=22)and the consistency judgment task group(n=24).Inhibition vs.excitation and inhibition were then induced in word sense,respectively.Event-related potentials(ERPs)N450 were then researched in both groups under the conditions between word sense and duration judgment the conflict and non-conflict.The results showed that:(1)In the conflict condition,reaction times signifi-cantly increased in both groups;meanwhile,the duration estimation task group's correct rate dramatically fell(P<0.05);(2)There was a significant variation in the amplitude of the N450 wave under the two conditions when word sense inhibition and excitation were induced simultaneously(P<0.05);(3)The sLORETA trace data showed that conflict processing was linked to both frontoparietal net-work and cingulate gyrus activation.The study indicates that the excitatory and inhibitory components of the stimulus have an impact on both the event-related potential N450 and the reactions of the subjects during stimulus conflict.
关键词
Stroop/认知控制/事件相关电位/冲突监控/N450Key words
Stroop/Cognitive control/Event-related brain potentials/Conflict monitoring/N450引用本文复制引用
基金项目
上海理工大学科技发展项目(2019KJFZ239)
上海理工大学科技发展项目(2020KJFZ232)
出版年
2024
国家科技期刊平台
NSTL
万方数据