摘要
目的利用事件相关电位技术(event—related potentials,ERPs)考察高低感觉寻求者的抑制控制机制。方法利用感觉寻求量表选取高低感觉寻求者各16人为实验对象,要求被试完成两种难度刺激的Go/Nogo任务;同时记录32导脑电。结果2种难度刺激下(一致性刺激,不一致刺激):(1)Nogo刺激的N2、P3波幅(FCZ)分别为[(1.61±4.25)μV,(-2.32±4.55)μV]和[(16.44±5.74)μV,(17.00±5.71)μV](2)Nogo束0激的N2波幅[F(1,30)=0.31,P=0.59,T/2=0.01;F(1.30)=0.07,P=0.80,η2=0.002]、N2d波幅[F(1,30)=1.18,P=0.29,η2=0.04;F(1,30)=0.004,P=0.95,η2〈0.001]、Nogo刺激的P波幅[F(1,30)=0.13,P=0.72,η2=0.004;F(1,30)=0.28,P=0.60,η2=0.009]以及P3d波幅[F(1,30)1=0.08,P=0.50,η2=0.02;F(1,30)=0.56,P=0.46,η2=0.02]的组别主效应均不显著;(3)N2和P3潜伏期的组别主效应均不显著(P〉0.05)。结论高低感觉寻求者在抑制控制功能上没有差异,感觉寻求行为与个体的抑制控制功能无关。
Objective To investigate the neural mechanism of inhibitory control in sensation seeking by using the event-related potential(ERP) technique. Methods High and low sensation seekers( 16 people in each group) ,who were selected according to their sensation seeking scores,performed a Go/Nogo task in which the stimuli possessed two levels of difficulty. Electroencephalogram(EEG) signals were recorded continuously by a set of 32 Ag/AgCI electrodes. Results For two types of stimuli(Congruent,Incongruent) : ( 1 )The amplitude(FCZ) of Nogo N2 and Nogo P3 were ( ( 1.61 ± 4.25 ) μN, ( - 2.32 ± 4.55 ) μV ) and ( ( 16.44 ± 5.74 ) μV, ( 17.00 ± 5.71 )μV). (2)There was no significant main effects of group for the Nogo N2 amplitude( F (1,30) = 0.31, P= 0.59,η2 =0.01;F(1,30) =0.07,P=0.80, η2=0.002) ,the N2d amplitude(F(1,30) =1.18, P=0.29, η2=0.04; F(1.30) = 0. 004, P=0.95, η2 〈 0. 001 ) ,the Nogo P3 amplitude( F (,.30) = 0.13, P= 0.72, η2 =0. 004;F(1,30) =0.28, P=0.60,η2 =0.009) and the P3d amplitude( F (1.30) =0.08, P=0.50, η2 =0.02; F (1,30) =0.56, P = 0.46, η2 = 0.02). (3) Neither of main effects for the N2 and P3 latency was significant (P〉 0.05 ). Conclusion The inhibitory control is similar across high and low sensation seeking groups,indicating that there is no relationship between the sensation seeking behaviors and the individual inhibitory control.
出处
《中华行为医学与脑科学杂志》
CAS
CSCD
北大核心
2011年第1期25-27,共3页
Chinese Journal of Behavioral Medicine and Brain Science
基金
辽宁省医学重点专科建设项目
关键词
感觉寻求
抑制控制
事件相关电位
Sensation seeking
Inhibitory control
Event-related potential