首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 109 毫秒
1.
阿尔茨海默病(Alzheimer‘s disease,AD)是老年人常见的中枢神经系统退行性疾病,是老年期痴呆最常见的原因。临床上以记忆减退、认知障碍、语言障碍、视空间障碍、人格改变为特征,并影响患者的职业、社交及日常生活自理能力,病情持续进展。轻度认知功能障碍(mild cognitive impairment,MCI)是界于正常和痴呆之间的中间阶段,以记忆障碍为突出表现,可有其他认知功能减退,但日常活动能力正常,不符合痴呆诊断的标准。我们曾对AD和MCI做了多方面的深入研究。本文拟对AD和MCI患者的注意功能进行综述。  相似文献   

2.
背景:阿尔茨海默病(Alzheimer disease,AD)和轻度认知功能障碍(mild cognitive impairment,MCI)患者均以记忆障碍为早期突出表现,但临床上患者常有注意力下降的表现,影响到工作和日常生活:目的:探讨轻度AD患者和MCI患者的持续注意、选择注意和分散注意功能。设计:病例-对照研究:单位:一所大学医院神经内科和一所大学的心理学系。对象:实验于2003—11/2004—01在北京大学第一医院神经心理室完成,选择18例轻度AD患者(AD组),19例MCI患者(MCI组)和20例正常对照组。干预:对轻度AD患者、MCI患者和正常对照进行持续操作任务(continuous performance test,CPT)实验测查持续注意功能,简化的斯特鲁普(Stroop)实验测查选择注意功能,应用纸笔形式的双任务实验测查分散注意能力。主要观察指标:在CPT和Stroop实验中主要观察反应时和错误率,在双任务实验中主要观察双任务下降程度。结果:CPT实验中,轻度AD组反应时、漏报率和虚报率均高于正常对照组[(539.29&;#177;103.86)ms比(458.47&;#177;40.87)ms,4.08%(3.13.13.64)比0.91%(0.60,1.90),1.51%(0.64,2.54)比0.43%(0.37,0.84),P&;lt;0.05],MCI组和正常对照组间无差别;3组的漏报率随时间增高,10~15min明显:10min后轻度AD患者的异常率明显增高(10min内异常率为33.33%,20min异常率77.8%)。Stroop实验中,3组被试均表现出明显的干扰效应;轻度AD组反应时长于MCI组和正常对照组[(579.19&;#177;89.93)ms,(524.28&;#177;68.96)ms,(486.75&;#177;51.58)ms,P&;lt;0.05],错误率干扰量高于其他两组[11.25%(7.50,22.50),2.50%(-2.50,5.00),2.50%(0.00.4.38),P&;lt;005];MCI组总错误率以及一致和中性条件下的错误率高于正常对照组[5.83%(4.17.8.33)比2.92%(1.67,3.96),5.00%(2.50,7.50)比0.00%(0.00,2.50).5.00%(2.50.10.00)比2.50%(0.00,5.00),P&;lt;0.05]。双任务实验中轻度AD组双任务减退量高于MCI组和正常对照组[103(0.49,3.75),0.46(0.08,1.02),0.10(-025,0.64),P&;lt;0.05];MCI组和正常对照组间无差别。同一组轻度AD患者,Stroop实验和CPT实验异常率高于双任务实验(81.25%,77.8%,29.41%)。结论:与正常老年人相比,轻度AD患者的持续注意、选择注意和分散注意能力下降,选择及持续注意障碍较突出。MCI患者选择注意功能有下降的趋势,持续和分散注意正常。轻度AD患者、MCI患者和正常老年人持续注意能力随时间下降,10min后明显。较长时间的CPT实验容易检出轻度AD患者的持续注意障碍。  相似文献   

3.
背景阿尔茨海默病(Alzheimer disease,AD)和轻度认知功能障碍(mild cognitive impairment,MCI)患者均以记忆障碍为早期突出表现,但临床上患者常有注意力下降的表现,影响到工作和日常生活.目的探讨轻度AD患者和MCI患者的持续注意、选择注意和分散注意功能.设计病例-对照研究.单位一所大学医院神经内科和一所大学的心理学系.对象实验于2003-11/2004-01在北京大学第一医院神经心理室完成,选择18例轻度AD患者(AD组),19例MCI患者(MCI组)和20例正常对照组.干预对轻度AD患者、MCI患者和正常对照进行持续操作任务(continuous performance test,CPT)实验测查持续注意功能,简化的斯特鲁普(Stroop)实验测查选择注意功能,应用纸笔形式的双任务实验测查分散注意能力.主要观察指标在CPT和Stroop实验中主要观察反应时和错误率,在双任务实验中主要观察双任务下降程度.结果CPT实验中,轻度AD组反应时、漏报率和虚报率均高于正常对照组[(539.29±103.86)ms比(458.47±40.87)ms,4.08%(3.13,13.64)比0.91%(0.60,1.90),1.51%(0.64,2 54)比0.43%(0.37,0.84),P<0.05],MCI组和正常对照组间无差别;3组的漏报率随时间增高,10~15 min明显.10 min后轻度AD患者的异常率明显增高(10 min内异常率为33 33%,20 min异常率77 8%).Stroop实验中,3组被试均表现出明显的干扰效应;轻度AD组反应时长于MCI组和正常对照组[(579 19±89.93)ms,(524.28±68.96 ) ms,(486.75±51.58)ms,P<0 05],错误率干扰量高于其他两组[11.25%(7 50,22.50),2 50%(-2.50,5.00),2.50%(0.00,4.38),P<0.05];MCI组总错误率以及一致和中性条件下的错误率高于正常对照组[5.83%(4.17,8.33)比2.92%(1.67,3.96),5.00%(2.50,7.50)比0.00%(0.00,2.50),5 00%(2.50,10.00 )比2.50%(0.00,5.00),P<0.05].双任务实验中轻度AD组双任务减退量高于MCI组和正常对照组[1.03(0.49,3.75),0.46(0.08,1.02),0.10(-0.25,0.64),P<0.05];MCI组和正常对照组间无差别.同一组轻度AD患者,Stroop实验和CPT实验异常率高于双任务实验(81.25%,77.8%,29.41%).结论与正常老年人相比,轻度AD患者的持续注意、选择注意和分散注意能力下降,选择及持续注意障碍较突出.MCI患者选择注意功能有下降的趋势,持续和分散注意正常.轻度AD患者、MCI患者和正常老年人持续注意能力随时间下降,10 min后明显.较长时间的CPT实验容易检出轻度AD患者的持续注意障碍.  相似文献   

4.
目的 探讨轻度认知功能障碍(MCI)患者的视觉注意功能.方法 采用基本认知能力测验和事件相关电位(ERPs)技术--视觉Oddball试验对16例老年MCI患者(MCI组)和17名年龄匹配的正常老年人(对照组)进行测试,对基本认知能力测验结果、ERPs的行为数据、P3b(选择性注意)和P3a(非选择性注意)的波幅和潜伏期进行比较.结果 MCI组的无意义图形再认和双字词再认成绩明显低于对照组,差异有统计学意义(P<0.05);MCI组的正确率明显低于对照组,反应时明显长于对照组,差异均有统计学意义(P<0.01);MCI组P3a波幅明显低于对照组,P3b潜伏期明显短于对照组,差异有统计学意义(P<0.01);MCI组和对照组无意义图形再认正确数均与P3a波幅相关(P<0.01).结论 MCI患者的非选择性注意功能下降,选择性注意反应速度减慢.
Abstract:
Objective To explore the visual attention of mild cognitive impairment patients.Methods Basic cognitive ability test and oddball task event-related potentials(ERPs) were used to measure the visual attention of 16 mild cognitive impairment subjects( MCI group)and 17 health older adults(control group).Results came from Basic cognitive ability test, data of ERPs beheavior and the amplitude and latency of P3a( related to nonvoluntary attention )and P3b (related to voluntary attention)of the two said groups were compared and contrasted.Result The resuits of meaningless figures recognition and two-word recogniton of MCI group were lower than NC group significantly ( P < 0.05 ).The correct rate of MCI group was were lower than control group significantly( P < 0.01 ).The reaction time of MCI group was were longer than control group significantly( P < 0.01 ).The amplitude of P3a was lower than the health control( P < 0.01 )significantly.The latency of P3b was significantly prolonged compared to the control (P < 0.01 ).The correct number of meaningless figures recognition of MCI group and control group were respectively corrected with the amplitude of P3a of the groups ( MCI group R = 0.83, P < 0.01 ; control group R = 0.86, P <0.01 ).Conclusions The mild cognitive impairment patients had deficit on non-selective attention function.The selectiv attention function of MCI group was slower compared to conntrols.  相似文献   

5.
目的 探讨轻度认知功能障碍(MCI)患者的视觉注意功能.方法 采用基本认知能力测验和事件相关电位(ERPs)技术--视觉Oddball试验对16例老年MCI患者(MCI组)和17名年龄匹配的正常老年人(对照组)进行测试,对基本认知能力测验结果、ERPs的行为数据、P3b(选择性注意)和P3a(非选择性注意)的波幅和潜伏期进行比较.结果 MCI组的无意义图形再认和双字词再认成绩明显低于对照组,差异有统计学意义(P<0.05);MCI组的正确率明显低于对照组,反应时明显长于对照组,差异均有统计学意义(P<0.01);MCI组P3a波幅明显低于对照组,P3b潜伏期明显短于对照组,差异有统计学意义(P<0.01);MCI组和对照组无意义图形再认正确数均与P3a波幅相关(P<0.01).结论 MCI患者的非选择性注意功能下降,选择性注意反应速度减慢.  相似文献   

6.
目的 探讨轻度认知功能障碍(MCI)患者的视觉注意功能.方法 采用基本认知能力测验和事件相关电位(ERPs)技术--视觉Oddball试验对16例老年MCI患者(MCI组)和17名年龄匹配的正常老年人(对照组)进行测试,对基本认知能力测验结果、ERPs的行为数据、P3b(选择性注意)和P3a(非选择性注意)的波幅和潜伏期进行比较.结果 MCI组的无意义图形再认和双字词再认成绩明显低于对照组,差异有统计学意义(P<0.05);MCI组的正确率明显低于对照组,反应时明显长于对照组,差异均有统计学意义(P<0.01);MCI组P3a波幅明显低于对照组,P3b潜伏期明显短于对照组,差异有统计学意义(P<0.01);MCI组和对照组无意义图形再认正确数均与P3a波幅相关(P<0.01).结论 MCI患者的非选择性注意功能下降,选择性注意反应速度减慢.  相似文献   

7.
目的:探讨轻度认知功能障碍(MCI)患者的神经心理学特点,为MCI患者制定认知训练提供依据。方法:对在老年病科门诊体检的60例老年人进行神经心理量表检查,分为正常(NC)组、轻度认知功能障碍(MCI)组和阿尔茨海默病(AD)组各20例,由经过专业培训的护士专人测定,采用简易智力状态检查(MMSE)、日常生活能力量表(ADL)进行调查研究。结果:神经心理量表评分MMSE分值:NC组为(29.300&#177;0.923)分,MCI组为(25.300&#177;1.261)分,AD组为(13.000&#177;2.675)分,三组间有显著差异(P〈0.05),MCI组的分值介于正常组与AD组之间;ADL分值:NC组为(22.500&#177;1.604)分,MCI组为(22.800&#177;2.308)分,AD组为(53.700&#177;13.191)分,三组间分值有显著差异(P〈0.05).MCI组的分值略高于正常组而明显低于AD组。结论:MCI患者者存在多项认知功能的损害,在短时记忆、视空间、计算力以及执行功能方面表现出不同程度的下降,与早期阿尔茨海默病有相类似的神经心理特点。  相似文献   

8.
目的:旨在探讨阿尔茨海默病( AD)和非缺血性轻度认知功能障碍( MCI)患者的血脂水平,从而探讨血脂与认知功能的关系。方法收集住院的老年患者282例,根据诊断标准分为AD组、MCI组和认知功能正常组(对照组),调查血脂水平,并用单因素和多因素分析进行统计。结果单因素分析结果显示血清总胆固醇、低密度脂蛋白在AD组和正常对照组相比有显著性差异,低密度脂蛋白在MCI组和AD组中差异也有显著性。多因素分析结果显示血清总胆固醇和低密度脂蛋白与MoCA量表评分具有相关性。结论本研究提示控制血清总胆固醇和低密度脂蛋白可以减少AD 的发病,延缓病情的进展。  相似文献   

9.
目的:探究MCI及AD高龄老人营养状态的特点,分析认知功能与营养状态的关系,为今后关于认知障碍老年患者的营养干预策略的研究提供临床依据。方法:纳入高龄患者共121例,其中认知功能正常者35例,MCI患者45例,AD患者41例,采用MMSE进行精神状态评估,MNA进行老年整体营养状态评估,检测三组患者血清营养相关性指标包括血红蛋白、前白蛋白、白蛋白、肌酐等。结果:1.MCI组、AD组的血红蛋白、前白蛋白、白蛋白、肌酐、MNA值均低于认知功能正常组(P0.05,P0.01),且AD组血红蛋白、前白蛋白、白蛋白、肌酐、MNA值均低于MCI组(P0.05,P0.01)。2.MCI组、AD组潜在营养不良风险及营养不良比例明显高于认知正常组(P0.05,P0.01),AD组营养不良比例明显高于MCI组(P0.05,P0.01)。结论:MCI及AD高龄较认知正常老人身体营养受损程度更重,营养受损程度与认知障碍的严重程度关系密切。  相似文献   

10.
近年来,老年人轻度认知功能障碍(mild cognitive impairment,MCI)受到极大关注.这一概念自1996年被美国著名精神科专家Petersen正式命名,后被公认为是痴呆的前期状态[1-2],是介于正常老化和痴呆之间的一种过渡阶段的认知功能障碍,是一种有记忆障碍主诉和客观认知损伤依据,但又不能诊断为痴呆的临床状态.  相似文献   

11.
目的 探索轻度阿尔茨海默病(AD)和轻度认知障碍(MCI)患者在汉语词汇认知加工过程中单个汉字语义和语音时间进程及模式的改变特点。方法 运用反应时方法对轻度AD和MCI患者以及年龄、性别及文化程度相匹配的正常对照(NC)进行汉语单字启动命名任务,任务采用语义、同音、变调和无关对照4种启动类型,设立长短两种刺激呈现间隔(SOA),被试对目标字进行命名,分别记录被试的反应时和错误率,通过语义和语音启动与无关对照反应时比较,判断是否出现语义或语音启动效应。结果 轻度AD和MCI患者各启动类型的反应时均较正常对照延长,正常对照组在长SOA时的反应时短于短SOA时,而轻度AD组长SOA时的反应时较短SOA时长;正常对照组出现同音启动效应,而轻度AD和MCI组出现变调抑制效应。结论 轻度AD和MCI汉字整体认知加工速度减慢,语音加工过程受损。  相似文献   

12.
轻度认知障碍患者记忆力的功能磁共振研究   总被引:14,自引:5,他引:14  
目的为探索早期诊断阿尔茨海默病 (AD)的方法 ,将神经心理测定和功能磁共振 (fMRI)检查相结合 ,了解轻度认知障碍 (MCI)患者在记忆方面的脑功能情况。方法 9例MCI患者和 9名正常对照在进行无意义图形记忆和再认时行fMRI检查 ,对反应时间、正确率和fMRI的脑激活图进行比较。结果患者的反应时间比正常对照明显延长 (P <0 0 1) ,正确率显著降低 (P <0 0 0 1)。脑激活图显示 ,与对照相比 ,在记忆编码时 ,患者主要在左侧前额叶背外侧和海马旁回、以及以右侧为主的后部脑区激活减弱 ,记忆提取时 ,在双侧前额叶背外侧 ,左侧海马旁回和前扣带回 ,以及后部脑区激活减弱。结论MCI患者的记忆功能已有损害。记忆功能的fMRI检查与认知神经心理学的联合研究能为早期诊断AD提供有力的参考依据。  相似文献   

13.
Brain damage in Alzheimer's disease (AD) and mild cognitive impairment (MCI) is widespread with involvement of large portions of the neocortex and the subcortical white matter. A quantitative measure of neuronal damage of the entire brain might be valuable in the context of large-scale, longitudinal studies of these patients. This study investigated the extent of neuroaxonal injury of patients with AD and MCI using a novel unlocalized proton magnetic resonance spectroscopy ((1)H-MRS) technique, which allows quantification of the concentration of N-acetylaspartate from the whole of the brain tissue (WBNAA). Conventional brain MRI and WBNAA were obtained from 28 AD patients, 27 MCI patients and 25 age-matched controls. Normalized brain volume (NBV) was also measured using an automated segmentation technique. WBNAA and NBV showed a significant heterogeneity between groups (P < 0.001). WBNAA concentration was different between controls and MCI patients (P = 0.003), but not between MCI and AD patients (P = 0.33). NBV differed both between controls and MCI patients (P = 0.02) and between MCI and AD patients (P = 0.03). A multivariate regression model retained WBNAA as the best MRI predictor of the Mini Mental State Examination score (P = 0.001). Significant neuronal damage, which is related to the extent of cognitive decline, can be quantified in the whole brain tissue of patients with AD, using a novel (1)H-MRS approach. The demonstration in patients with MCI of MR structural and metabolic findings, intermediate between those of healthy volunteers and those of AD patients, indicates that neuronal damage is already evident and widespread in individuals with MCI before they are clinically demented.  相似文献   

14.
轻度认知障碍患者计算能力的fMRI研究   总被引:7,自引:4,他引:7  
目的 探讨早期诊断A1zheimer病的方法,以及轻度认知障碍(MCI)患者计算能力损害的脑功能定位。方法 对8例MCI患者和9例正常对照使用神经心理测定和功能磁共振(fMRI)检查相结合的方法,比较两组反应时间、正确率和fMRI的脑激活图。结果 患者的反应时间比对照组延长(退位减法P>0.05,非退值减法P<0.05一0.01),正确率降低(P<0.01-0.001)。脑激活图显示:患者在左侧前额叶外下部,颞叶外侧和顶叶激活减弱(P<0.05),而右侧前额叶外下部激活代偿性增强(P<0.05)。结论MCI患者的计算功能已有损害。计算功能的fMRI与认知神经心理学的联合研究能为早期诊断AD提供有力的参考依据。  相似文献   

15.
目的探讨轻度认知功能障碍(MCI)患者神经心理学和ApoE基因多态性与健康老年的差异。方法对23例MCI患者和28例健康对照进行简易精神状态检查表、日常生活行为量表、Preffer门诊患者功能缺损调查表、物体记忆测验、词语流畅性测验、数字广度、逻辑记忆、无意义图形、画钟测验、延迟记忆、临床痴呆量表、总体衰退量表、Hachinski缺血积分量表、流调用自评抑郁量表等神经心理学及ApoE基因检查。结果神经心理学检查显示:MCI患者的记忆、执行功能、视空间能力以及注意力、计算力与健康对照组有显著性差异(P<0.05~0.001),尤以记忆(逻辑记忆和语义记忆)最为突出,命名保留,日常生活能力正常;ApoE基因多态性检查显示,McI患者£4携带率约为健康对照的10倍。结论McI是AD的危险因素,应用神经心理学敏感指标结合其他生物学指标如ApoE基因多态性检测可提高AD早期诊断的敏感性和特异性。  相似文献   

16.
轻度认知障碍的有关护理研究   总被引:2,自引:0,他引:2  
韶红 《护理研究》2004,18(22):1982-1983
介绍了轻度认知障碍的诊断标准、流行病学调查情况和护理干预。  相似文献   

17.
目的 评价计算机化认知训练对轻度认知障碍老年人的干预效果。方法 检索中英文数据库中有关计算机化认知训练对轻度认知障碍老年人干预效果的随机对照试验,应用Revman5.2软件进行Meta分析。结果 共纳入12篇文献,涉及488例病人。结果显示,干预结束时试验组简易精神状态量表(MMSE)和蒙特利尔认知功能状态量表(MoCA)得分优于对照组[MD=1.78, 95%CI(0.41,3.15), P<0.05],[MD=4.02, 95%CI(1.33,6.70), P<0.05];试验组顺向数字测试(DSF)和逆向数字测试(DSB)得分优于对照组[MD=1.01, 95%CI(0.39,1.64), P<0.05],[MD=0.67, 95%CI(0.16,1.17), P<0.05];试验组延迟回忆得分优于对照组[MD=1.20, 95%CI(1.00,1.39), P<0.05];但对言语流畅性测试(SF)、老年抑郁量表(GDS)和日常生活能力量表(ADL)得分的改善效果不明显。结论 计算机化认知训练能改善轻度认知障碍老年人的整体认知功能, 尤其是注意力和短时记忆力以及延迟记忆能力方面,但对言语功能、抑郁状态和ADL改善效果不明显。还需大样本、高质量的随机对照试验进行验证。  相似文献   

18.
轻度认知功能损害患者汉语双词素词的语音编码研究   总被引:5,自引:3,他引:5  
目的探讨轻度认知功能损害 (MCI)患者汉语言语产生中双词素词语音激活的特点。方法对 10例MCI患者和 10例正常对照采用同音判断方法 ,选用以偏正结构的双词素词为名称的图片和与双词素词中首尾两个词素同音的两组探测字作为实验材料 ,探测字在图片呈现后 10 0ms出现 ,要求被试判断出现的探测字是否与图片名称中任何一个词素同音。对两组的反应时和错误率进行比较。结果正常老年人尾词素激活快于首词素激活 ,而MCI患者首尾词素激活时间无明显差异。首尾词素探测条件下正常老年人反应的错误率无明显差异 ,而MCI患者对尾词素探测条件的错误率低于首词素。结论正常老年人和MCI患者汉语言语产生中双词素词语音编码模式相同 ,均受词义和词素意义激活程度的影响 ;但激活的速度MCI患者慢于正常老年人。提示MCI患者语义记忆和语音提取的过程受损。  相似文献   

19.
Recent genetic and proteomic studies demonstrate that clusterin/apolipoprotein-J is associated with risk, pathology, and progression of Alzheimer's disease (AD). Our main aim was to examine associations between plasma clusterin concentration and longitudinal changes in brain volume in normal aging and mild cognitive impairment (MCI). A secondary objective was to examine associations between peripheral concentration of clusterin and its concentration in the brain within regions that undergo neuropathological changes in AD. Non-demented individuals (N = 139; mean baseline age 70.5 years) received annual volumetric MRI (912 MRI scans in total) over a mean six-year interval. Sixteen participants (92 MRI scans in total) were diagnosed during the course of the study with amnestic MCI. Clusterin concentration was assayed by ELISA in plasma samples collected within a year of the baseline MRI. Mixed effects regression models investigated whether plasma clusterin concentration was associated with rates of brain atrophy for control and MCI groups and whether these associations differed between groups. In a separate autopsy sample of individuals with AD (N = 17) and healthy controls (N = 4), we examined the association between antemortem clusterin concentration in plasma and postmortem levels in the superior temporal gyrus, hippocampus and cerebellum. The associations of plasma clusterin concentration with rates of change in brain volume were significantly different between MCI and control groups in several volumes including whole brain, ventricular CSF, temporal gray matter as well as parahippocampal, superior temporal and cingulate gyri. Within the MCI but not control group, higher baseline concentration of plasma clusterin was associated with slower rates of brain atrophy in these regions. In the combined autopsy sample of AD and control cases, representing a range of severity in AD pathology, we observed a significant association between clusterin concentration in the plasma and that in the superior temporal gyrus. Our findings suggest that clusterin, a plasma protein with roles in amyloid clearance, complement inhibition and apoptosis, is associated with rate of brain atrophy in MCI. Furthermore, peripheral concentration of clusterin also appears to reflect its concentration within brain regions vulnerable to AD pathology. These findings in combination suggest an influence of this multi-functional protein on early stages of progression in AD pathology.  相似文献   

20.
Mild cognitive impairment (MCI) comprises a heterogeneous group with a variety of clinical outcomes and they are at risk for developing Alzheimer's disease (AD). The prediction of conversion from MCI to AD using the initial neuroimaging studies is an important research topic. We investigated the initial regional cerebral blood flow (rCBF) measurements using single photon emission computed tomography (SPECT) in individuals with 76 amnesic MCI (52 subjects converted to AD and 24 subjects did not convert to AD at 3-year follow-up) and 57 age- and gender-matched controls. We sought functional profiles associated with conversion to AD, then evaluated the predictive value of the initial rCBF SPECT. As compared with controls, AD converters demonstrated reduced blood flow in the bilateral parahippocampal gyri, precunei, posterior cingulate cortices, bilateral parietal association areas, and the right middle temporal gyrus. Non-converters also demonstrated significant reduction of rCBF in the posterior cingulated cortices and the right caudate nucleus when compared to controls. As compared with non-converters, converters showed reductions of rCBF in the bilateral temporo-parietal areas and the precunei. The logistic regression model revealed that reduced rCBF in the inferior parietal lobule, angular gyrus, and precunei has high predictive value and discriminative ability. Although a cross-validation study is needed to conclude the usefulness of rCBF SPECT for the prediction of AD conversion in individuals with MCI, our data suggest that the initial rCBF SPECT studies of individuals with MCI may be useful in predicting who will convert to AD in the near future.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号