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刺激的N2波幅[F(1.30)=0.31,P=0.59,η 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P3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)=0.08,P=0.50,η2=0.02;F(1.30)=0.56,P=0.46,η 2=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.

abstractsObjective 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. Electro- encephalogram(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)μV,(-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 (1.30) =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.