基于N-back认知任务的正常脑老化事件相关电位分析

本文旨在研究不同N-back认知任务下正常脑老化的全脑事件相关电位P300的变化趋势。通过对15个正常年轻人和10个正常老年人进行N-back认知任务下全脑的事件相关电位P300的测定,将所得结果进行分析。结果表明,在执行相同负荷的认知任务时,老年人的P300潜伏期较年轻人在全脑范围内增长;峰值较年轻人在前额-中央区增加,其中在前额区增加的差异具有统计学意义;在认知任务负荷增加时,老年人峰值在全脑范围内增大,以额-中央区为主,但老年人在两种负荷认知任务下的峰值差异不具有统计学意义;而潜伏期在右脑额-中央区缩短,在两种负荷认知任务下的潜伏期差异具有统计学意义。因此,全脑事件相关电位P300显示正常脑老化主要影响着前额区,且相比于低负荷认知任务,执行高负荷认知任务时更能反映老化对脑功能特征的影响。通过本文以上研究结果,期望可对早期老年痴呆患者的检出具有启示意义。     

癫痫儿童认知电位P300及其影响因素分析

目的：研究癫痫儿童认知电位P300E事件相关电位（ERP）的P300成分]及其影响因素。方法：检测分析85例癫痫儿童及63例健康对照的认知电位P300,并探讨癫痫儿童认知电位P300各影响因素的作用。结果：以健康儿童作比较,癫痫儿童P300潜伏期延长．差肄有显著意义（P〈0．01）,波幅降低。差异也有显著意义（P〈0．05）;Logistic回归分析显示发病年龄早和发作频繁是癫痫儿童P300潜伏期延长、认知功能损害加重的危险因素,减少发作频率为其保护因素。结论：认知电位P300可以较客观及早地反映癫痫儿童的认知状况。应于患病早期积极抗癫痫治疗,降低认知功能受损的发生率。     

汉字刺激正常儿童认知电位的研究

目的：探讨8岁组正常儿童汉字刺激产生认知电位的特征。方法：对53名正常儿童采用加拿大Stellate Systems 32道数字化无纸脑电图仪，并用汉字、韩字，汉字打乱形式三种刺激模块检测(包括常规及快流方法)。刺激信号同步触发，脑电图(EEG)同步记录，从EEG中提取认知电位(RP)，事件相关电位(P300)进行分析。结果：RP及P300潜伏期各不相同，RP的潜伏期较：P300潜伏期早；汉字潜伏期最短，对照组汉字打乱形式较韩字潜伏期长；常规及快流二种刺激方法比较无显著性差异：汉字刺激在枕前后部记录认知电位最大。结论：汉字刺激RP及P300将有助于评估儿童认知功能的发展。     

听觉和视觉认知电位P300系列成分的临床电生理学特征

目的:通过对视觉和听觉事件相关电位P300系列成分的研究,了解其临床电生理学特征,从而为临床评价脑认知功能的状态提供依据。方法:使用经典的Odball P300刺激范式对29名志愿者分别进行视觉、听觉刺激,采用64导ERP数据采集分析系统进行数据采集及离线分析。使用SPSS 17.0对所得数据进行统计分析。结果:听觉P1波幅和潜伏期的性别主效应均显著(F=5.44,22.45;P=0.02,0.00),N1波幅的性别和电极部位主效应也均显著(F=4.50,17.85;P=0.04,0.00),P2波幅的电极部位主效应明显(F=17.64,P=0.00);而视觉P1、N1、P2的波幅和潜伏期中,仅P2波幅的电极部位主效应显著(F=3.51,P=0.04)。视觉性P1、N1、P2电位潜伏期明显小于听觉性P1、N1、P2(F=20.45,104.12,107.26;P=0.00),P1和N1的波幅明显低于听觉性P1、N1(F=7.05,133.82;P=0.01,0.00),听觉性N2、P300电位潜伏期明显大于视觉性N2和P300(F=52.43,52.64;P=0.00),视觉N2的波幅也明显高于听觉性N2(F=26.00,P=0.00),但视觉性P300波幅与听觉性P300无差异(F=0.00,P=0.989)。结论:听觉诱发电位具有早期外源性感知电位影响因素较多,P300等晚期内源性认知电位虽然相对稳定,但有波幅较低的缺点;视觉诱发电位早期外源性感知电位同样结果较稳定但波幅低,而晚期内源性认知电位具有波幅高和波形分化好的优点。因此同时检测视觉和听觉P300能够更加准确地评价大脑的认知功能。     

梗死灶大小对急性颞叶或枕叶梗死患者认知障碍的影响及其与事件相关电位P300潜伏期的关系

目的 探讨急性颞叶或枕叶梗死患者梗死灶的大小对认知功能障碍发生率的影响,以及认知障碍与事件相关电位P300潜伏期的相关性。方法 前瞻性研究。纳入2020年1月—2021年7月蚌埠市第三人民医院神经内科急性颞叶或枕叶梗死患者100例为观察组,其中男52例、女48例,年龄50~82（70.2±7.9）岁,受教育年限5~9（5.3±0.9）年,有吸烟史21例、饮酒史17例,合并高血压36例、糖尿病24例、冠心病10例。观察组患者均行头颅MR扫描并测量梗死灶大小,按照测量结果分组：梗死灶≥30 cm³为观察A组（41例）,梗死灶<30 cm³为观察B组（59例）。选取同时期年龄、性别与观察组患者相匹配的50例健康体检者为对照组,其中男25例、女25例,年龄50~82（71.3±7.2）岁。对比3组受试者性别、年龄、受教育年限、吸烟史、饮酒史,以及合并高血压、糖尿病、冠心病情况等临床基线资料;采用蒙特利尔认知评估（MoCA）量表评估所有受试者认知功能,并测定所有受试者的事件相关电位P300潜伏期,观察组在住院1周后病情稳定情况下进行测试,对照组在体检当天进行测试;采用Spearman相关分析法评估观察组中认知障碍患者的P300潜伏期与MoCA评分的相关性。结果 3组受试者基线资料比较差异均无统计学意义（P值均>0.05）。观察A组、观察B组与对照组MoCA评分分别为27（23,28）分 、28（27,29）分和29（28,30）分,P300潜伏期分别为380（320,380） ms、310（ 290,350） ms和290（280,300） ms,认知障碍患者分别占43.9%（18/41）、32.2%（19/59）和2%（1/50）,对照组患者较2个观察组的MoCA评分高、P300潜伏期短、认知障碍发生率低,3组间比较差异均有统计学意义（Z=34.29、64.00,χ²=23.34,P值均<0.001）;与观察B组比较,观察A组患者的MoCA评分低、P300潜伏期长,差异有统计学意义（P值均<0.001）。Spearman相关分析显示,观察组中37例认知障碍患者的MoCA评分[25（22,27）分]与P300潜伏期[360（320,416）ms]呈负相关（r_s=-0.36,P<0.05）。结论 急性颞叶或枕叶梗死患者梗死灶的大小对患者认知障碍的发生有影响;合并认知障碍的患者事件相关电位P300潜伏期与MoCA量表评分呈负相关,两者对患者认知功能的评估结果具有较好的一致性。     

精神发育迟滞儿童的事件相关电位P300的特征

目的探讨精神发育迟滞（MR）儿童的事件相关电位P300的特征。方法对30名精神发育迟滞儿童（精神发育迟滞组）和30名正常儿童（正常对照组）分别进行事件相关电位P300测定，取P300的潜伏期和波幅，将所得结果进行统计学分析。结果与正常对照组相比，精神发育迟滞组儿童事件相关电位视觉P300波的潜伏期延长，波幅降低，差异显著（P〈0．05）。结论事件相关电位P300的潜伏期和波幅可客观地反映精神发育迟滞儿童的认知功能的变化，具有协助诊断的意义，可作为评价精神发育迟滞患儿的认知功能的客观指标之一。     

基于 P300的3D 影片背景视差过大对人体健康的影响

针对3D 影片中出现的背景视差过大是否会引起人体不适的问题，我们分析了20名志愿者先后观看明显含有背景视差过大的3D 片段和不含背景视差过大的3D 片段后 P300峰值和潜伏期的变化。发现志愿者在观看含有背景视差过大的3D 片段后 P300的峰值略高于观看相应不含该问题的3D 片段 P300的峰值，然而，观看含有背景视差过大的3D 片段后 P300的潜伏期略低于观看相应不含背景视差过大的 P300的潜伏期。结合志愿者的主观评价，可以得出短时间内出现的背景视差过大不会导致人体不适。     

老年糖尿病人P300认知电位改变及相关因素分析

目的：了解老年糖尿病人P300认知电位的改变及与病程、糖代谢及并发症的关系。方法：采用听觉oddball序列刺激的诱发电位方法对50例老年糖尿病人及20例健康老年人进行测试。结果：糖尿病组与对照组比较,糖尿病并腔隙性脑梗塞组与无脑梗塞组比较P300波潜伏期显著延长,P300波波幅显著降低,糖尿病组P300波潜伏期和波幅与病程长短、糖化血红蛋白及有无高血压病无明显相关。结论：老年糖尿病人比正常老年人P300波潜伏期明显延长,P300波波幅明显降低,合并腔隙性梗塞可能是其P300波改变的主要原因之一。     

癫痫患者的事件相关电位与认知功能研究

目的探讨癫癎患者事件相关电位(ERP)与认知功能状况。方法对350例癫癎患者和150例正常对照组进行认知功能30题(CCSE)、简易智力状态试验(MMSE)和ERPPP300的测定。结果癫癎部分性发作者的P300潜伏期比全身性发作者明显延长,波幅降低显著,认知功能测试得分也较低;未能分类发作患者的P300潜伏期延长不明显,认知功能测试得分近于正常。病程＞5年者的P300潜伏期较病程1～5年的延长明显,波幅降低显著,认知功能测试得分也较低;病程＜1年者P300潜伏期延长不明显,认知功能测试得分在正常范围。同时用三种药者的P300潜伏期较同时用两种药者的延长明显,波幅降低显著,认知功能测试得分也较低;同时用两种药者的P300潜伏期也比用一种药者明显延长,认知功能测试得分也较低;用一种药者的P300潜伏期延长不明显,认知功能测试得分在正常范围。结论部分性发作患者的P300潜伏期延长较全身性发作者明显;病程越长,P300潜伏期延长越显著;多种用药患者的P300潜伏期延长较用一种药者显著。     

壳聚糖磷脂酰胆碱防治轻度认知功能障碍的P300研究

目的采用事件相关电位技术(ERP),研究轻度认知功能障碍(MCI)患者服用壳聚糖磷脂酰胆碱前后在执行单位加法心算任务时的脑内时程的P300波幅和潜伏期的差别,旨在探讨壳聚糖磷脂酰胆碱对MCI患者P300的影响。方法采用纵向研究配伍组设计方案,根据MCI的诊断标准选取15例MCI患者,采用事件相关电位(ERP)分析技术,通过单位加法心算实验,分析其P300成分的变化。结果①MCI患者用药前后反应时比较有显著性差异(P=0.000);②用药后MCI患者的P300波幅比用药前波幅显著降低(F=28,P=0.038)。结论①壳聚糖磷脂酰胆碱可以提高MCI患者的心算能力和心算速度;②壳聚糖磷脂酰胆碱可以提高MCI患者注意、记忆等认知能力;③服用壳聚糖磷脂酰胆碱后,MCI患者对算式视觉刺激的感知、辨别变得敏感,神经细胞在对算式的认知加工阶段兴奋性增高,短时间内动用相对较多的资源,从而提高了心算效率。     

S-adenosylmethionine decreases the peak blood alcohol levels 3 h after an acute bolus of ethanol by inducing alcohol metabolizing enzymes in the liver

Introduction

An alcohol bolus causes the blood alcohol level (BAL) to peak at 1–2 h post ingestion. The ethanol elimination rate is regulated by alcohol metabolizing enzymes, primarily alcohol dehydrogenase (ADH1), acetaldehyde dehydrogenase (ALDH), and cytochrome P450 (CYP2E1). Recently, S-adenosylmethionine (SAMe) was found to reduce acute BALs 3 h after an alcohol bolus. The question, then, was: what is the mechanism involved in this reduction of BAL by feeding SAMe? To answer this question, we investigated the changes in ethanol metabolizing enzymes and the epigenetic changes that regulate the expression of these enzymes during acute binge drinking and chronic drinking.

Methods

Rats were fed a bolus of ethanol with or without SAMe, and were sacrificed at 3 h or 12 h after the bolus.

Results

RT-PCR and Western blot analyses showed that SAMe significantly induced ADH1 levels in the 3 h liver samples. However, SAMe did not affect the changes in ADH1 protein levels 12 h post bolus. Since SAMe is a methyl donor, it was postulated that the ADH1 gene expression up regulation at 3 h was due to a histone modification induced by methylation from methyl transferases. Dimethylated histone 3 lysine 4 (H3K4me2), a modification responsible for gene expression activation, was found to be significantly increased by SAMe at 3 h post bolus.

Conclusion

These results correlated with the low BAL found at 3 h post bolus, and support the concept that SAMe increased the gene expression to increase the elimination rate of ethanol in binge drinking by increasing H3K4me2.     

Effectiveness of a web-based brief alcohol intervention and added value of normative feedback in reducing underage drinking: a randomized controlled trial

Background

Current insights indicate that Web-based delivery may enhance the implementation of brief alcohol interventions. Previous research showed that electronically delivered brief alcohol interventions decreased alcohol use in college students and adult problem drinkers. To date, no study has investigated the effectiveness of Web-based brief alcohol interventions in reducing alcohol use in younger populations.

Objective

The present study tested 2 main hypotheses, that is, whether an online multicomponent brief alcohol intervention was effective in reducing alcohol use among 15- to 20-year-old binge drinkers and whether inclusion of normative feedback would increase the effectiveness of this intervention. In additional analyses, we examined possible moderation effects of participant’s sex, which we had not a priori hypothesized.

Method

A total of 575 online panel members (aged 15 to 20 years) who were screened as binge drinkers were randomly assigned to (1) a Web-based brief alcohol intervention without normative feedback, (2) a Web-based brief alcohol intervention with normative feedback, or (3) a control group (no intervention). Alcohol use and moderate drinking were assessed at baseline, 1 month, and 3 months after the intervention. Separate analyses were conducted for participants in the original sample (n = 575) and those who completed both posttests (n = 278). Missing values in the original sample were imputed by using the multiple imputation procedure of PASW Statistics 18.

Results

Main effects of the intervention were found only in the multiple imputed dataset for the original sample suggesting that the intervention without normative feedback reduced weekly drinking in the total group both 1 and 3 months after the intervention (n =575, at the 1-month follow-up, beta = -.24, P = .05; at the 3-month follow-up, beta = -.25, P = .04). Furthermore, the intervention with normative feedback reduced weekly drinking only at 1 month after the intervention (n=575, beta = -.24, P = .008). There was also a marginally significant trend of the intervention without normative feedback on responsible drinking at the 3-month follow-up (n =575, beta = .40, P =.07) implying a small increase in moderate drinking at the 3-month follow-up. Additional analyses on both datasets testing our post hoc hypothesis about a possible differential intervention effect for males and females revealed that this was the case for the impact of the intervention without normative feedback on weekly drinking and moderate drinking at the 1-month follow-up (weekly drinking for n = 278, beta = -.80, P = .01, and for n = 575, beta = -.69, P = .009; moderate drinking for n = 278, odds ratio [OR] = 3.76, confidence interval [CI] 1.05 - 13.49, P = .04, and for n = 575, OR = 3.00, CI = 0.89 - 10.12, P = .08) and at the 3-month follow-up (weekly drinking for n = 278, beta = -.58, P = .05, and for n = 575, beta = -.75, P = .004; moderate drinking for n = 278, OR = 4.34, CI = 1.18 - 15.95, P = .04, and for n = 575, OR = 3.65, CI = 1.44 - 9.25, P = .006). Furthermore, both datasets showed an interaction effect between the intervention with normative feedback and participant’s sex on weekly alcohol use at the 1-month follow-up (for n = 278, beta = -.74, P =.02, and for n = 575, beta = -.64, P =.01) and for moderate drinking at the 3-month follow-up (for n = 278, OR = 3.10, CI = 0.81 - 11.85, P = .07, and for n = 575, OR = 3.00, CI = 1.23 - 7.27, P = .01). Post hoc probing indicated that males who received the intervention showed less weekly drinking and were more likely to drink moderately at 1 month and at 3 months following the intervention. For females, the interventions yielded no effects: the intervention without normative feedback even showed a small unfavorable effect at the 1-month follow-up.

Conclusion

The present study demonstrated that exposure to a Web-based brief alcohol intervention generated a decrease in weekly drinking among 15- to 20-year-old binge drinkers but did not encourage moderate drinking in the total sample. Additional analyses revealed that intervention effects were most prominent in males resulting in less weekly alcohol use and higher levels of moderate drinking among 15- to 20-year-old males over a period of 1 to 3 months.

Trial Registration

ISRCTN50512934; http://www.controlled-trials.com/ISRCTN50512934/ (Archived by WebCite at http://www.webcitation.org/5usICa3Tx)     

认知事件相关诱发电位P300的研究进展

目的 探讨认知事件相关诱发电位（ERP）P300的研究进展。方法 在万方数据、Pubmed等数据库查阅与认知ERP P300研究相关的文献,进行汇总分析。结果 ERP P300反映了大脑认知的加工过程,可对痴呆、脑血管疾病、脑外伤、癫痫、精神疾病等多种疾病进行早期认知减退的检测、认知功能和损害程度的评估以及认知功能的定量分析,具有较广泛的临床应用价值。但P300的临床应用存在没有业内公认的评定标准值、实际检测中影响因素较多等问题,其具体机制及相关问题的解决还有待于进一步更深入地探讨。结论 P300可以检测大脑神经细胞的动态认知过程,具有可靠、有效、客观、无创伤等特点,是其他脑影像技术所不能取代的一种检测方法。未来还需在P300及其亚波的产生定位及临床诊断的统一化标准化等方面做进一步的深入探索和研究。     

Influence of task difficulty on the features of event-related potential during visual oddball task

We present a comprehensive analysis of the change in event-related potential (ERP) due to task difficulty during a visual oddball task. Specifically, we investigated the inter-subject difference in difficulty-related change of ERP patterns using single-trial ERP analysis focusing on P300 and P2 components. ERPs were recorded and analyzed from 14 subjects while performing a visual oddball task with two difficulty levels. After extracting independent components (ICs) from single-trial ERPs, the averaged ERPs were used to identify which ICs originated from major ERP components. The ERP components were estimated from single-trial waveforms by back-projecting relevant ICs onto scalp electrodes after removing all other ICs; thus, the comparison of ERP components could be performed for each subject. The averaged P300 amplitude was smaller and latency was larger for the more difficult task, and this tendency was also observed for single-trial ERP analysis within each subject. P2 amplitude increased for the hard task for both group and individual analyses, suggesting that the P2 may be interpreted as a manifestation of task relevance evaluation or response generation. The P2 amplitude and latency were more notably correlated with response time for the more difficult task.     

The Effect of Prestimulus Alpha Activity on the P300

Trials on which highly discrepant, auditory ‘oddball’ stimuli were presented were sorted into two bins on the basis of prestimulus alpha band RMS magnitude. The trial bins were then separately averaged to produce a ‘high alpha’ auditory ERP (event-related potential) and a ‘low alpha’ ERP for each subject. Study 1 found that larger amplitude P300s were obtained in the ‘high alpha’ ERP. No effect of alpha was found on the N100. Study 2 employed extra factors of stimulus intensity change (increases and decreases) and alpha measurement period (before and after the ‘oddball’ stimulus). It was found that P300 amplitude enhancement was independent of both stimulus intensity and the amount of alpha poststimulus. The data are discussed in terms of cascaded inhibition from the mesencephalic reticular formation to nucleus reticularis of the thalamus to a thalamo-cortical system responsible for the generation of both alpha and the P300.     

网络成瘾青少年事件相关电位P300的溯源研究

目的：利用偶极子溯源分析方法,探讨网络成瘾青少年事件相关电位（ERP）P300成分的脑内起源。方法：网络成瘾青少年和正常对照者各10例,采用视觉Oddball范式对被试进行刺激以诱发ERPP300成分,利用偶极子溯源分析方法对P300的脑内起源进行定位,并将溯源后P300的起源位置和fMRI中与网络成瘾相关的脑区进行对比,了解两者的相关性。结果：网络成瘾组与对照组相比,ERPP300波的峰潜伏期缩短、波幅升高;总平均P300电位波溯源定位在扣带回中后部,fMRI中发现网络成瘾青少年在接受网络内容刺激后扣带回中后部也出现明显的激活。结论：网络成瘾青少年P300电位的脑内起源主要位于扣带回中后部,该部可能参与了网络成瘾的形成。     

优秀运动员应激引起的消化系统躯体化症状与P300变化的相关性研究

目的探讨优秀射击运动员应激状态下消化系统躯体化症状与ERP中P 300变化的关系。方法使用N euroScan 32Channel ERP System记录20名上海市优秀一线射击运动员应激前后P 300波幅、潜伏期,用SCL-90、功能性胃肠病罗马Ⅲ型诊断标准中消化系统躯体化症状条目对运动员测评,并进行比较分析。结果在8项消化系统躯体化症状中,反酸、恶心、呕吐、腹泻有显著性差异。有反酸症状的运动员应激后P 300潜伏期(425.83±36.82)高于无反酸症状运动员(377.14±32.32);有恶心症状的运动员应激后P 300波幅(11.34±4.31)低于无恶心症状运动员(16.81±4.97);有呕吐症状的运动员应激前(9.82±3.25)及应激后(7.55±1.35)P 300波幅均低于无恶心症状的运动员应激前(15.91±3.74)及应激后(16.05±4.52);有腹泻症状的运动员应激后P 300潜伏期(363.00±6.59)低于无腹泻症状的运动员(410.92±41.54)。结论消化系统躯体化症状与P 300变化具有相关性,提示不同消化系统躯体化症状发生机理与认知加工过程密切相关。     

急性饮酒对青年心率变异的影响及性别差异研究

目的通过检测轻度急性饮酒前后心率变异性指标,评价酒精对于自主神经活动影响的性别差异。方法20例健康志愿者．其中男性10例．年龄（20．1±0．6）岁：女性10例．年龄（19．6±0．8）岁。根据受试者体质量计算乙醇溶液饮用量（0．27g／kg）。分别在饮酒前和饮酒后15min、45min共3次记录心电信号．提取RR间期时间序列,计算心率变异性（HRV）评价指标,包括时域参数RR间期的平均值（RRI）、全部RR间期标准差（SDRR）、全程相邻RR间期之差的均方根（RMSSD）、相邻RR间期之差大于50ms的心搏动数占总心搏动数的比例（pNN50）,频域参数低频频段（LF）、高频频段（HF）和LF／HF,Poincar6图参数宽度（短轴,SDl）、长度（长轴,SD2）和SDl／SD2。结果时域参数、频域参数和P0inca诺参数存急性饮酒后降低。对于RMSSD和SDRR参数．仅在女性受试者中观测到饮酒45min后降低．差异均具有统计学意义（P〈0．05）。对于LF和SDl参数在饮酒后15min即观测到在男性受试者中降低,差异均具有统计学意义（P〈0．05）。结论少量的急性饮酒降低了心率变异程度．酒精抑制了副交感神经的活动度．女性比男性对酒精的敏感程度更高．男性自主种经活动对酒精影响的响应时间更短。     

Event-related potentials in a moving matrix modification of the P300 brain-computer interface paradigm

In the standard design of the brain–computer interfaces (BCI) based on the P300 component of the event-related potentials (ERP), target and non-target stimuli are presented at fixed positions in a motionless matrix. Can we let this matrix be moving (e.g., if attached to a robot) without loosing the efficiency of BCI? We assessed changes of the positive peak at Pz in the time interval 300–500 ms after the stimulus onset (P300) and the negative peak at the occipital electrodes in the range 140–240 ms (N1), both important for the operation of the P300 BCI, during fixating a target cell of a moving matrix in healthy participants (n = 12). N1 amplitude in the difference (target − non-target) waveforms decreased with the velocity, although remained high (M = −4.3, SD = 2.1) even at highest velocity (20°/s). In general, the amplitudes and latencies of these ERP components were remarkably stable in studied types of matrix movement and all velocities of horizontal movement (5, 10 and 20°/s) comparing to matrix in fixed position. These data suggest that, for the users controlling their gaze, the P300 BCI design can be extended to modifications requiring stimuli matrix motion.     

癫癎患者的事件相关电位与临床相关性研究

目的：研究癫癎患者的事件相关电位（ERP）的变化规律及其与癫癎临床的相互关系,并对ERP技术在其中的应用价值进行评价。方法：对癫癎患者在发作间期进行ERP检测。以潜伏期、波幅为观察指标。检测Fz、Cz、Pz点的N100、P200、、N200、P300波潜伏期,P300波波幅。结果：病例组与对照组相比,Cz点N100、P200、N200、P300波潜伏期延长（P〈0．01）,P300波波幅病例比较对照组降低显著（P=0．00）;癫癎患者头颅CT／MRI异常组较头颅CT／MRI正常组N200及P300波潜伏期延长（P〈0．05）。用两种及以上抗癎药组较用1种抗癎药组P200波潜伏期延长（P=0．00）;病程〉5年组较1～5年组P200波潜伏期延长（P=0．00）。结论：癫癎患者存在认知功能障碍,并有相应的ERP改变。ERP能够客观、灵敏地评价癫癎患者的高级认知功能损害。