吸烟成瘾者与网络成瘾者的特质冲动及认知抑制的事件相关电位分析

An event-related potentials analysis of impulsivity and cognitive inhibition in smoking addicts and Internet addicts

目的:比较吸烟成瘾者与网络成瘾者的特质冲动及认知抑制功能的异同。方法:通过网络成瘾量表(IAT)、尼古丁依赖量表(FTND)筛选出吸烟成瘾组25例、网络成瘾组25例及正常对照组28例,采用UPPSP冲动行为量表进行冲动性测试,并采用事件相关电位(ERP)技术对所有被试进行经典色词Stroop实验,记录脑电数据。结果:网络成瘾组及吸烟成瘾组的UPPSP消极紧迫感、积极紧迫感得分高于对照组(P<0.05);吸烟成瘾组Stroop色词不一致正确率低于网络成瘾组及对照组(P<0.05);ERP分析显示,吸烟成瘾组及网络成瘾组N200的潜伏期均高于对照组(P<0.05),且两组在顶枕区诱发的P300波幅均低于对照组(P<0.05);吸烟成瘾组前额区N450波幅低于对照组(P<0.05)。结论:与正负性情绪相关的冲动性水平升高、认知冲突抑制不足可能是网络成瘾者与吸烟成瘾者的共同特征。

Objective:To compare the differences of impulsive traits and cognitive inhibition in smoking addicts and Internet addicts.Methods:Twenty-five people in the smoking addiction group,25 people in the Internet addiction group and 28 people in the normal control group were selected with the Internet Addiction Test(IAT)and nicotine dependence scale(FTND).The UPPSP Impulsive Behavior Scale(UPPSP)was used for the test,and the event-related potential(ERP)method was used for the experiment of all subjects with the classic color word Stroop task.Results:The UPPSP scores of negative urgency and positive urgency were higher in the Internet addiction group and smoking addiction group than in the control group(P<0.05).The correct rates of the Stroop color-word inconsistency in the smoking addiction group were lower than in the Internet addiction group and control group(P<0.05).Event-related potential analysis showed that the latencies of N200 in the smoking addiction group and Internet addiction group were higher than in the control group(P<0.05),and the amplitudes of P300 induced in parietal occipital areas in both groups were lower than in the control group(P<0.05).The amplitudes of N450 in the frontal region in the smoking addiction group were lower than in the control group(P<0.05).Conclusion:The increased level of impulsive traits associated with positive and negative emotion and the decrease of cognitive conflict inhibition may be the common characteristics of smoking addicts and Internet addicts.