Spatio-temporal progression of the AEP P300 component using the cortical imaging technique

Summary The cortical imaging technique (CIT), a mathematical method for simulating the potential fields on the surface of the brain, was used to analyze the spatio-temporal progression of the AEP P300 component (as well as the preceding and subsequent N2a and N3 components) from thirty normal adult subjects recorded in a standard oddball paradigm. Comparisons were made between the progressions of the endogenous event-related cognitive potentials and the exogenous stimulus-dependent potentials (Nl component). Cortical imaging results suggest that different and multiple generator sites are involved in the production of exogenous and endogenous evoked responses. We particularly note the asymmetric development of the P300 component and the apparent anterior generator sites for the N2a component. This last result is interesting because the N2a precedes the P300 component and supports an earlier frontal contribution.     

ALzheimer病认知功能与认识性诱发电位P_(300)的研究

目的 :研究 ALzheimer病 ( AD)患者神经心理学测验与认知性诱发电位的相关性。方法 :应用丹麦设备和两种短音刺激 ,对 3 1例 AD患者和 3 2例正常老年人 ( NC)做了心理学测试及 P3 0 0 检查。结果 :两组神经心理学测验指标经协方差分析均达到显著性水平。两组 P3 0 0 靶刺激潜伏期比较 AD组 (观察组 )明显慢于 NC组 (对照组 )。结论 :AD患者神经心理学测验与 P3 0 0 检查有相关性 ,且有助于鉴别 AD与正常衰老     

Visual event-related potentials in progressive supranuclear palsy, corticobasal degeneration, striatonigral degeneration, and Parkinson's disease

To determine whether there are characteristic changes in event-related potentials (ERPs) in parkinsonian syndromes we studied 8 patients with progressive supranuclear palsy (PSP), 10 patients with corticobasal degeneration (CBD), 9 patients with striatonigral degeneration (SND), and 16 patients with idiopathic Parkinson's disease (PD) with a mean duration of illness shorter than 5 years in each group. A visual oddball paradigm was employed to elicit P300. P300 to the rare target and rare nontarget stimuli and reaction time (RT) to rare target stimuli in each group were compared with those in the corresponding age-matched normal control group and to each other after age correction. The correlation of P300 and RT to motor disability score was also studied. In PSP P300 amplitude was markedly reduced while in CBD P300 latency was prolonged. P300 amplitude to rare nontargets in SND and PD was attenuated. The mean RT in the PSP and the CBD group was significantly longer than in the other two groups. The mean RT in PD and P300 amplitude to rare nontargets in both CBD and PD showed significant correlation with the severity of motor disability. Simultaneous measurement of P300 and RT may yield useful supplementary information in facilitating diagnosis of parkinsonian syndromes in addition to clinical criteria. Received: 6 April 1999, Received in revised form: 5 August 1999, Accepted: 12 January 2000     

奥拉西坦治疗轻中型脑伤的临床研究

目的：通过神经电生理监测来评价益智药奥拉西坦治疗轻中型脑伤的疗效。方法：采用随机双盲对照试验，对照药物为吡拉西坦。将连续收治的48例轻中型脑伤患者随机分入奥拉西坦组和吡拉西坦组，每组24例。分别于用药前、用药21天后进行定量脑电图和P300数据采样。统计分析各组用药前后定量脑电图和P300的差异；比较两种药物对定量脑电图和P300的影响。结果：两组患者用药后的定量脑电图和P300均有明显改善（P〈0．05）；奥拉西坦对脑电图和P300的影响较吡拉西坦更大（P〈0．05）。结论：奥拉西坦对轻中型脑伤患者脑功能的改善有明显促进作用，且功效较吡拉西坦更强。     

Preoperative contralateral lung radiation dose is associated with postoperative pulmonary toxicity in patients with locally advanced non-small cell lung cancer treated with trimodality therapy

Purpose

In patients with non-small cell lung cancer (NSCLC) who undergo trimodality therapy (chemoradiation followed by surgical resection), it is unknown whether limiting preoperative radiation dose to the uninvolved lung reduces postsurgical morbidity. This study evaluated whether radiation fall-off dose parameters to the contralateral lung that is unaffected by NSCLC are associated with postoperative complications in NSCLC patients treated with trimodality therapy.

伴中央颞区棘波的儿童良性癫痫共患注意缺陷多动障碍患儿认知功能损害的前瞻性研究

目的 探讨伴中央颞区棘波的儿童良性癫痫(benign childhood epilepsy with centrotemporal spikes,BECT)共患注意缺陷多动障碍(attention deficit hyperactivity disorder,ADHD)患儿与单纯BECT患儿或单纯ADHD患儿认知功能损...     

滋肾健智饮对血管性痴呆患者MMSE评分、P300、EEG的影响

目的：观察滋肾健智饮治疗血管性痴呆的临床疗效。方法：将60例患者随机均分为治疗组和对照组,在基础治疗的基础土,治疗组加用滋肾健智饮治疗,对照组只进行基础治疗。比较两组治疗前后MMSE评分、P30H0、EEG的变化,并观察不良事件和副反应。结果：两组患者MMSE评分、P300、EEG均有明显的改善,且治疗组明显优于对照组。结论：滋肾健智饮治疗血管性痴呆效果显著,且毒副作用少。     

电针百会穴对脑梗死后认知障碍患者听觉P300的影响

目的观察电针百会穴对脑梗死后认知障碍患者听觉事件相关电位P300的影响。方法将59例脑梗死患者随机分为治疗组30例和对照组29例。治疗组采用电针配合认知功能训练治疗,对照组采用单纯认知功能训练治疗。比较两组治疗前后蒙特利尔认知评价量表(MoCA)评分及P300检测情况。结果两组患者治疗后MoCA量表各项评分与同组治疗前比较,差异均具有统计学意义(P0.05)。除言语项目外,治疗组患者治疗后MoCA量表各项评分与对照组比较,差异均具有统计学意义(P0.05)。两组治疗后P300潜伏期、波幅与同组治疗前比较,差异均具有统计学意义(P0.01)。治疗组治疗后P300潜伏期、波幅与对照组比较,差异均具有统计学意义(P0.05)。P300潜伏期与MoCA评分呈负相关性,P300波幅与MoCA评分呈正相关性。结论电针百会能改善脑梗死后认知障碍患者的认知功能。     

中青年OSA H S患者缺氧程度与认知功能损害的相关性研究

目的探讨青年OSAHS患者缺氧程度与认知功能的相关性。方法选取OSAHS患者63例,年龄18～44岁。根据OSAHS患者的低氧血症程度,将患者分为轻度组20例（最低SaO2≥85％）,中度组24例（最低SaO265％～84％）,重度组19例（最低SaO2〈65％）;对照组25例（正常人：AHI〈5）。均进行事件相关电位P300、多导睡眠图（polysomnogram,PSG）和简易智能精神状态检查量表（mini-mental state examination,MMSE）检测。结果①OSAHS患者轻度、中度、重度三组P300潜伏期分别为326．1±12．7、346．9±19．1、334．9±18．3ms,与对照组311．9±18．3ms比较差异均有统计学意义（皆P〈0．05）,0SAHS轻、中度组与重度组之间差异均有统计学意义（P〈0．01或P〈0．05）,但轻度组和中度组患者之间差异无统计学意义（P=0．095）;②重度组中因最低血氧持续时间的不同P300潜伏期不同：最低血氧持续时间4～60秒组潜伏期为338．12±13．7ms,最低血氧持续时间61～140秒组潜伏期为354．74±16．7HiS,差异有统计学意义（P=0．031）;③以上各组P300波幅之间比较差异无统计学意义;④所有患者MESS得分均在正常范围内,但部分得分稍低,重度组与对照组得分比较差异有统计学意义（RA-Ra=9．91,P=0．003）。结论OSAHS患者普遍存在认知功能障碍,可以最低血氧程度及其持续时间初步评估认知功能损害的程度。