阿尔茨海默病患者的内隐记忆启动效应研究

目的探讨阿尔茨海默病患者(Alzheimer disease,AD)内隐记忆概念性启动和知觉性启动损害的特征。方法采用分类产生和图片辨别对30例aMCI患者、30例AD和30名正常老年人的内隐记忆(概念性启动和知觉性启动)进行测试,同时进行神经心理学测试(DS、VFT、CTT干扰时间),并进行组间比较和分析。结果与正常老年组、aMCI相比,AD患者组DS、VFT、CTT干扰时间及概念性启动成绩均差于正常对照组(P0.01);而知觉性启动成绩差异无统计学意义(P0.05)。结论 AD患者DS、VFT、CTT干扰时间及内隐记忆概念性启动存在损害,提示与AD患者的额叶功能减退可能有关,并且内隐记忆概念启动损害,为早期发现AD患者提供一个新依据。     

左右额叶肿瘤患者注意功能的研究

目的 研究左右额叶肿瘤患者的注意功能的损害和事件相关电位(event related potential,ERP)P300的有关参数的变化,了解左右额叶肿瘤对注意功能损害的特点.方法 对31例额叶肿瘤患者(左侧15例、右侧16例)及30例正常对照分别进行Stroop字色干扰实验、数字广度测验(digit span test,DST)、数字颜色连线测验(Color trail test 1,CTT)测试注意功能的神经认知心理学测验和P300检查,并对两者作相关性研究.结果 与正常对照组比较:右额叶肿瘤患者Stroop test、DST、CTT评分均低于正常组,有统计学意义.左额叶肿瘤患者的各项评分虽也低于正常组,但与正常组相比差异无统计学意义.左右两组事件相关电位的P3波潜伏期均延长,P3波幅均降低,均有有统计学意义.神经认知心理学评分与P300有相关性.结论 右侧额叶肿瘤对患者的注意功能损害更严重.P300与注意功能有相关性,但不具有特异性.     

首次发病的强迫症患者认知功能的研究

目的:探讨首次发病的强迫症(OCD)患者认知功能的特点及相关影响因素。方法:采用逻辑记忆、视觉再生记忆、连线测验、数字广度、Stroop测验及威斯康星卡片分类测验分别对35例首次发病的OCD患者(OCD组)及30名健康对照者(HC组)进行神经心理学测评;应用Yale-Brown强迫量表(Y-BOCS)、抑郁自评量表(SDS)、状态-特质焦虑问卷(STAI)评定患者的病情及抑郁、焦虑程度。结果:OCD组的逻辑延迟记忆、视觉再生记忆、连线测验A、B时间、数字广度倒背、Stroop测验字色阅读时间、威斯康星卡片分类测验成绩较明显差于健康对照组(P均<0.05)。OCD患者的病程与其视觉延迟记忆、数字广度倒背分呈负相关(r=-0.39,P=0.024;r=-0.38,P=0.027),SDS分与Stroop测验字色阅读时间正相关(r=0.37,P<0.05),Y-BOCS分、SAI分及TAI分与各神经心理学指标的相关性无统计学意义(P均>0.05)。结论:首次发病的OCD患者存在记忆、注意和执行功能损害。     

早期帕金森病患者项目记忆及源记忆能力的研究

目的研究早期帕金森病(PD)患者项目记忆及源记忆的特点。方法对25例早期PD患者(PD组)及25名健康对照者(正常对照组)进行MMSE、词汇流畅性测试(VFT)、数字广度(DS)、stroop色词试验、听觉词汇学习测试(AVLT)以及项目记忆、源记忆检查,并进行比较。结果 PD组和正常对照组MMSE、VFT、DS、stroop色词试验差异无统计学意义(均P0.05)。与正常对照组比较,PD组AVLT即刻回忆评分显著降低(P0.05),延迟回忆评分差异无统计学意义(P0.05)。与正常对照组比较,PD组源记忆正确度显著降低(t=-2.800,P0.05),记忆区别度差异无统计学意义(t=-1.462,P0.05)。结论早期PD患者的情景记忆障碍主要表现为源记忆障碍,项目记忆却相对保留,可能与其额叶功能损害有关。     

述情障碍的执行功能研究

目的 通过对述情障碍者的额叶执行功能研究,探讨述情障碍可能的神经机制.方法 纳入正常人群述情障碍者33例和对照组30名,采用Stroop色词测验,数字广度和数字符号测验比较2组的执行功能.结果 述情障碍组在Stroop色词测验中C项的反应时低于对照组[(19.93±0.95)s vs s(24.49±1.27)s, t=2.83, P＜0.01],干扰抑制效应明显长于对照组[(9.55±0.86)s vs (5.59±0.61)s, t=3.75, P＜0.001].述情障碍组与对照组间数字广度(顺/反)记忆数和数字符号测验得分的差异也有统计学意义(P＜0.05).结论 述情障碍存在额叶执行功能障碍,额叶损害可能是述情障碍的神经机制之一.     

化疗对胃肠肿瘤患者认知功能的影响

目的探讨化疗对胃肠肿瘤患者认知功能的影响。方法采用词汇流畅、连线试验A、数字广度、符号编码、Stroop任务5项神经心理测试,对87例胃肠肿瘤患者(胃肠肿瘤组)化疗前、化疗结束后半年的认知功能进行评定,以60例正常健康人(正常组)为对照。结果 (1)化疗前胃肠肿瘤组各认知功能评测与正常组比较差异无统计学意义(P0.05);(2)化疗后胃肠肿瘤组的连线试验A、数字广度、符号编码、Stroop颜色、Stroop色词干扰成绩较化疗前明显下降(P0.01),化疗后胃肠肿瘤组的连线试验A、数字广度、符号编码、Stroop颜色、Stroop色词干扰成绩也较正常组差(P0.05)。结论化疗对胃肠肿瘤患者的认知功能有损害。     

癫痫患者执行功能损害特点及影响因素研究

目的分析癫痫患者执行功能损害的特点及相关影响因素。方法1999年1月～2006年4月在我院癫痫专病门诊就诊或长期随访的109例成年癫痫患者和75例正常对照者进行神经认知心理测验，包括语义流畅性试验、数字广度测验、数字符号测验、色词干扰测验和连线试验检查。结果癫痫患者组语义流畅性显著差于正常对照组，数字广度、数字符号亦显著低于正常对照组．癫痫组连线时间、Stroop试验反应时显著延长，Stroop试验错误数显著增加（P〈0．01）。颞叶癫痫患者数字广度低于额叶癫痫患者。多元线性回归显示：文化程度高、非颞叶癫痫对语义流畅性有保护作用：文化程度高、单一抗癫痫药物治疗、病程短、年龄大对数字广度有保护作用；病程短、文化程度高和颅内无病灶对数字符号有保护作用。结论癫痫患者在多项执行功能方面均存在损害．文化程度高的患者执行功能相对较好；颞叶癫痫患者语义流畅性差；病程、药物、年龄对数字广度有影响：病程、有无病灶对数字符号有影响。     

脑小血管病患者伴发非痴呆血管性认知功能损害情况及尼莫地平疗效的研究

目的探讨脑小血管病(cerebral small vessel disease,SVD)不同亚型伴发非痴呆血管性认知功能损害的情况,评价尼莫地平对SVD的疗效。方法选择SVD患者118例,包括52例腔隙灶脑梗死(LI)和66例白质疏松(WML)患者。分别将LI组和WML组患者随机分组为治疗组(基础治疗加尼莫地平治疗)和对照组(基础治疗),进行6个月治疗。治疗前后对所有患者采用蒙特利尔认知评估量表(MoCA)、简易智能状态检查表(MMSE)、语义分类流畅测验(动物)、Stroop测验(计算错误数)、画钟试验、积木测验、数字广度顺背测验、数字符号测验、逻辑记忆亚测验和再生亚测验进行认知功能评价,并比较各组患者治疗前后认知功能评分。结果治疗前,LI组患者语义分类流畅测验(动物)、数字符号测验、逻辑记忆亚测验、视觉再生亚测验、MoCA、MMSE评分显著高于WML组患者,Stroop测验得分显著低于WML组患者。经过6个月治疗后,LI组和WML组患者中的对照组治疗前后各项认知功能评分均没有统计学差异(P>0.05)。LI组患者中治疗组MoCA、画钟试验和数字广度顺背测验得分升高,Stroop测验得分下降(均P<0.05);WML组患者中治疗组MoCA、MMSE、画钟试验、数字广度顺背测验和视觉再生亚测验得分升高,Stroop测验得分下降(均P<0.05)。结论 SVD两个亚型伴发非痴呆血管性认知功能损害情况不同,LI患者损害程度比WML患者轻。尼莫地平治疗可较好的改善患者的执行功能、视空间结构能力和注意力。     

儿童少年期精神分裂症患者及其一级亲属认知功能的对照研究

目的:探讨儿童少年期精神分裂症患者及其一级亲属的认知功能状况. 方法:对40例儿童少年期精神分裂症患者(患者组)、80名父母(患者父母组)及22名同胞(患者同胞组)采用注意力测验、WMS-R-逻辑记忆、数字广度、连线测验A和B、词汇流畅性测验、Stroop色词测验及威斯康星卡片分类测验(WCST)评定其认知功能,并与59名健康儿童(健康儿童对照组)及其父母(健康儿童父母组)80名进行比较. 结果:患者组除词汇流畅性测验以外,其他测验成绩差于健康儿童对照组;患者同胞组除数字顺背、词汇流畅性测验、连线测验-A、WCST正确应答数、WCST完成第1个分类应答数以外,其他测验成绩差于健康儿童对照组(P均＜0.001);患者父母组除数字顺背、词汇流畅性测验、连线测验-A以外,其他测验成绩差于健康儿童父母组(P＜0.01或P＜0.001).儿童精神分裂症患者与其父母在注意力测验、WMS-R-逻辑记忆、数字倒背、彩色文字阅读和彩色文字颜色阅读、WCST完成分数上呈正相关(r =0.350～0.615,P＜0.05或P＜0.001). 结论:儿童少年期精神分裂症患者及其一级亲属均存在广泛的认知功能缺陷,但患者的认知功能障碍更为严重.     

儿童期精神分裂症患者认知功能研究

目的:探索儿童期精神分裂症患者认知功能情况。方法:对15名年龄≤16岁以妄想为主要症状的精神分裂症患者(患者组)及15名正常匹配儿童(对照组)进行认知功能测验(包括听觉词汇学习、数字广度、数字符号及瑞文标准推理测验)。结果:患者组在听觉词汇学习、数字广度、数字符号及瑞文标准推理测验成绩均较对照组差。其中,知觉辨别的效应值最大为-2.10,其次为比较推理-1.68、抽象推理-1.59、即刻记忆-1.50、数字符号-1.44、系列关系-0.85、数字广度(倒背、正背)分别为-0.77,-0.58、类同比较-0.30、延迟记忆保持率的效应值为0.32。结论:儿童期精神分裂症患者在智能、逻辑推理、记忆功能、注意功能、执行功能等方面均有不同程度的损害。     

Clinical and neuropsychological features associated with structural imaging patterns in patients with mild cognitive impairment

AIM: To describe the clinical and neuropsychological features of mild cognitive impairment (MCI) patients with medial temporal atrophy (MTA), white matter hyperintensities (WMH), both, and neither and to assess whether the rate of progression differs among groups. METHODS: Ninety-five MCI patients were divided into 4 groups based on the presence of MTA and WMH: 29 were MTA- WMH-, 11 MTA- WMH+, 23 MTA+ WMH-, and 32 MTA+ WMH+. MCI patients were compared with 30 normal subjects. MTA and WMH were assessed with MR-based visual rating scales. Subjects underwent an extensive clinical and neuropsychological investigation. Fifty-six underwent follow-up evaluation. RESULTS: MTA- WMH- had relatively good neuropsychological performance, little vascular and physical comorbidity. MTA- WMH+ performed poorly only on executive neuropsychological tests. MTA+ WMH- patients had poor neuropsychological performances (mainly on memory tests), high physical and vascular comorbidity. MTA+ WMH+ were impaired in neuropsychological performances, had a high number of physical diseases and severe vascular comorbidity. On follow-up, 25% of MTA+ WMH- and 32% of MTA+ WMH+ and none in MTA- WMH- and in MTA- WMH+ converted to dementia (p = 0.05, log rank test). CONCLUSION: Structural neuroimaging can identify subgroups of MCI patients with specific clinical and neuropsychological features.     

Subjective cognitive complaints, neuropsychological performance, affective and behavioural symptoms in non-demented patients

OBJECTIVE: Subjective cognitive complaints (SCC) have been previously investigated to establish whether they are risk factors for dementia, but no clear-cut conclusions have emerged. In this study non-demented patients with SCC were studied and the neuropsychological findings, affective and behavioural aspects and parameters with the highest correct classifications in discriminating patients who had only SCC but no objective clinical and neuropsychological impairment, i.e. no cognitive impairment (NCI) patients and those with objective neuropsychological deficits, namely patients with mild cognitive (MCI) were analyzed. METHODS: Consecutive non-demented outpatients with SCC were enrolled of over 9 months and examined using neuropsychological tests and scales for depression, anxiety and behaviour. Clinical criteria and neuropsychological test results were used to classify patients into groups of NCI, MCI and subtypes of MCI. RESULTS: Ninety-two patients with SCC were included; 49 of them had objective deficits (MCI patients), whereas 43 were without any clinical and cognitive impairment (NCI patients). These patients had lower age, higher education and better general cognitive indices than MCI patients who had higher caregiver distress, depression and irritability. The combination of a battery for mental deterioration and for behavioural memory assessment were the most discriminative in differentiating the two groups. CONCLUSIONS: An objective cognitive impairment, reaching the criteria for a MCI diagnosis, was present in almost half of patients having SCC. MCI patients have more behavioural disturbances than NCI subjects. SCC should not be underestimated and appropriate neuropsychological assessment is required to reassure subjects with normal results and to identify patients with MCI.     

Clinical significance of subcortical vascular disease in patients with mild cognitive impairment

Patients with mild cognitive impairment (MCI) typically present with memory complaints. Some of these patients have subcortical vascular disease on computed tomography (CT) scan, namely white matter changes and lacunar infarcts, however it is not known whether these findings are associated with more pronounced cognitive deficits. In the present study we compare demographic, clinical and neuropsychological characteristics of MCI patients according to the presence or the absence of subcortical vascular disease. Forty consecutive patients with memory complaints, at least one neuropsychological memory test below 1 SD the normal for age and education, and maintained activities of daily living, were included. Patients with dementia, history of stroke or transient ischemic attack, or other brain disorders, were excluded. Twenty-five (62.5%) patients with MCI had no ischemic lesions on CT scan, and 15 (37.5%) were found to have subcortical vascular changes. MCI patients with subcortical vascular changes were older (77.1 +/- 6.8 vs. 70.8 +/- 7.5 years old), and more often males. The number of vascular risk factors, the frequency of neurological signs, the Hachinski score and the neuropsychological tests scores were not significantly different. The presence of subcortical vascular disease on CT scan is frequent in older patients with MCI, but does not appear to be associated with the severity of cognitive deficits.     

扩瞳试验对阿尔茨海默病的预测效应

目的利用扩瞳试验对轻度认知功能损害(Mild cognitive impairment,MCI)患者进行研究,了解MCI、阿尔茨海默病(AD)与正常老年人在扩瞳试验结果之间的差异,分析MCI与AD之间的关系,并探讨扩瞳试验是否能作为MCI发展成AD的预测指标。方法收集AD患者30例、MCI患者28例以及健康对照34例。分别进行神经心理学测验和扩瞳试验。比较三组的神经心理学测验和扩瞳试验结果之间的差异。计算扩瞳试验在诊断AD和MCI时的敏感性和特异性。结果MCI组的神经心理学测验都显著好于AD组(P<0.001),但都明显不如正常对照组(P<0.001)。AD患者和MCI患者在滴入扩瞳剂后,瞳孔直径明显扩大,与NC组有显著差异(P值分别为P<0.05,P<0.001),而AD组与MCI组之间则无统计学上的差异(P>0.05)。扩瞳试验诊断AD的敏感性和特异性分别为60.0%和67.65%,诊断MCI的敏感性和特异性分别为71.43%和67.65%。结论扩瞳试验可以将MCI患者和AD患者、与正常老年人区别开来,可以作为MCI和AD的一个筛选诊断标志。MCI是AD与正常衰老之间的过渡状态;MCI患者是AD的高危人群...     

老年轻度认知障碍记忆损害特点的研究

目的探讨老年轻度认知障碍患者的记忆损害特点,比较不同神经心理学测验对诊断和发现轻度认知障碍的敏感性,筛选临床实用的简捷敏感的神经心理学测验工具。方法轻度认知障碍患者20例,轻度阿尔茨海默病患者26例,健康老年人30名。应用词语回忆测验、图片回忆测验、数字广度测验、本顿视觉保持测验C式A法及D式D法进行测试。结果轻度认知障碍组在图片回忆分、视觉保持测验D式D法正确分及持续错误分上的成绩较正常对照组差(P<0．05);轻度认知障碍组视觉保持测验D法成绩明显差于A法(P<0．01)。结论轻度认知障碍患者对具体视觉形象的记忆能力及对无意义图形的视觉记忆能力受损,存在即刻记忆和延迟记忆障碍,且延迟回忆较即刻回忆损害明显,短时记忆更新的可塑性差;图片回忆测试、本顿视觉保持测验的延迟回忆测试或与即刻回忆联合测试有助于轻度认知障碍的早期发现。     

Amnestic mild cognitive impairment: diagnostic outcomes and clinical prediction over a two-year time period.

Amnestic mild cognitive impairment (MCI) has been defined as a precursor to Alzheimer's disease (AD), although it is sometimes difficult to identify which persons with MCI will eventually convert to AD. We sought to predict MCI conversion to AD over a two-year follow-up period using baseline demographic and neuropsychological test data from 49 MCI patients. Using a stepwise discriminant function analysis with Dementia Rating Scale (DRS) Initiation/Perseveration and Wechsler Memory Scale, third edition (WMS-III) Visual Reproduction Percent Retention scores, we correctly classified 85.7% of the sample as either AD converters or MCI nonconverters, with 76.9% sensitivity and 88.9% specificity. Adding race, the presence of vascular risk factors, or cholinesterase inhibitor use to the analysis did not greatly change the classification rates obtained with neuropsychological test data. Examining neuropsychological test cutoff scores revealed that DRS Initiation/Perseveration scores below 37 and Visual Reproduction Percent Retention scores below 26% correctly identified AD converters with 76.9% sensitivity and 91.7% specificity. These results demonstrate that commonly administered neuropsychological tests identify persons with MCI at baseline who are at risk for conversion to AD within 1-2 years. Such methods could aid in identifying MCI patients who might benefit from early treatment, in providing prognostic information to patients, and identifying potential clinical trial participants.     

Neuropsychological performance in mild cognitive impairment with and without apathy

OBJECTIVE: To investigate the neuropsychological characteristics of patients diagnosed with mild cognitive impairment (MCI) with and without apathy. METHODS: A cohort of 245 MCI patients (mean age = 72 +/- 5.5 years; mean MMSE = 27.5 +/- 1.3) was divided into two subgroups according to their Apathy Inventory score and underwent an extensive neuropsychological battery. RESULTS: There were 94 (38.4%) patients with and 151 (61.6%) patients without apathy. At baseline the apathetic subgroup had a significantly lower total score on the free and cued selective reminding test (FCSR). Furthermore, the apathetic subgroup showed a significant deterioration in FCSR total recall score between baseline and the 1-year assessment. In conclusion, the presence of apathy in MCI patients is not associated with frontal task performance but with a higher degree of memory impairment.     

Clinical referral patterns and cognitive profile in mild cognitive impairment

BACKGROUND: There is current interest in exploring the different subtypes of mild cognitive impairment (MCI), in terms of both their epidemiology and their cognitive profile. AIMS: To examine the frequency of MCI subtypes presenting to a memory clinic and to document detailed neuropsychological profiles of patients with the amnestic subtype. METHOD: Consecutive tertiary referrals (n=187) were psychiatrically evaluated; 45 patients met criteria for amnestic mild cognitive impairment (aMCI). A subgroup of 33 patients with aMCI as well as 21 healthy controls took part in a thorough neuropsychological examination. RESULTS: Of the patients who were examined in greater neuropsychological detail, ten had pure aMCI (none with visual memory impairment only). Fifteen met criteria for non-amnestic MCI. Fifteen had normal neuropsychological profiles. Using more than one test increased sensitivity to detect episodic memory impairment. CONCLUSIONS: Amnestic MCI is an important diagnosis in secondary and tertiary memory clinics. There is scope to improve the efficacy and sensitivity of the clinical assessment of this impairment.     

Plasma level of chitinase 3-like 1 protein increases in patients with early Alzheimer’s disease

Previously, chitinase 3-like 1 (CHI3L1) protein level was increased in various inflammatory conditions and cancers. This study was aimed to evaluate the plasma CHI3L1 level as a potential prognostic biomarker for Alzheimer’s disease (AD). Forty-nine patients with mild cognitive impairment (MCI), 61 patients with mild to severe AD, and 35 healthy elderly controls were recruited for this study. They were given a comprehensive neuropsychological test battery including a mini-mental status examination (MMSE), clinical dementia rating (CDR), and neuropsychiatric inventory (NPI). The CHI3L1 levels were measured using a specific enzyme-linked immunosorbent assay in the plasma and cerebrospinal fluid (CSF). A significant increase in the mean plasma level of CHI3L1 was found in early AD patients compared to control subjects and MCI patients. No significant difference was found between MCI patients and controls. There was a significant positive correlation between CHI3L1 levels and neuropsychological test scores such as CDR and NPI in MCI and early AD patients. Our results demonstrate that CHI3L1 plasma levels are elevated in early AD compared to control or MCI patients. Thus, CHI3L1 plasma levels may be useful as a biomarker, reflecting disease severity in AD patients.     

轻度认知功能障碍患者的神经心理学研究

目的 探讨轻度认知功能障碍(MCI)患者神经心理学的特点. 方法 对42例MCI患者和55例健康对照者进行多项神经心理学检查,包括简易精神状态检查量表(MMSE)、蒙特利尔认知评估量表(MoCA)、临床痴呆评定量表(CDR)、语言流畅性测验(RVR)、韦氏智力测验(WAIS-RC)[包括数字广度测验(DS)、积木测验(BD)、相似性测验]、韦氏记忆测验(WMS-R)(包括逻辑记忆、联想学习、视觉再认、图片回忆)、日常生活能力量表(ADL),比较2组患者上述量表评分和MMSE、MoCA量表各亚项评分的差异.结果 与对照者比较,MCI患者MMSE、MoCA总分和RVR、WAIS-RC、WMS-R分测验,MoCA量表各亚项(地点定向力除外),MMSE量表中计算与注意、延迟回忆两亚项评分较低,差异均有统计学意义(P<0.05).结论 MCI患者不仅记忆受损,其计算与注意力、命名、视空间结构能力、执行功能也可受损,尤以延迟回忆、计算与注意力受损明显.MoCA涵盖了重要的认知领域,能较全面评估MCI患者的认知功能,值的临床推广应用.