目的通过测量静息态BOLD-fMRI低频振荡振幅ALFF(amplitude of low-frequency fluctuation)值,分析其在脑胶质瘤、脑炎的健侧与患侧以及正常人群中的改变,探索ALFF值在鉴别诊断脑胶质瘤与脑炎的潜在价值。方法采用前瞻性病例-对照研究,...目的通过测量静息态BOLD-fMRI低频振荡振幅ALFF(amplitude of low-frequency fluctuation)值,分析其在脑胶质瘤、脑炎的健侧与患侧以及正常人群中的改变,探索ALFF值在鉴别诊断脑胶质瘤与脑炎的潜在价值。方法采用前瞻性病例-对照研究,对脑胶质瘤30例,脑炎30例及40名健康志愿者作静息态BOLD-fMRI检查,使用DPARSF软件计算ALFF,获得胶质瘤患侧组(ipsilateral gliomagroup,IGG)、胶质瘤健侧组(contralateral glioma group,CGG)、脑炎患侧组(ipsilatera lencephalitis group,IEG)、脑炎健侧组(contralateral encephalitis group,CEG)和胶质瘤的正常对照组(corresponding areas of glioma in healthy control group,CAGHCG)、脑炎的正常对照组(corresponding areas of encephalitis in health ycontrol group,CAEHCG)的ALFF值。应用独立样本t检验、配对样本t检验及受试者工作特征(receiver operator characteristic curve,ROC)曲线进行统计学分析。结果(1)IGG与CGG、IGG与CAGHCG、IGG与IEG的ALFF值及(IGG-CGG)/IGG与(IEG-CEG)/IEG组间差异具有统计学意义(P<0.01)。(2)IGG与CGG、IGG与IEG的ROC曲线具有很高的AUG、诊断阈值、灵敏度和特异度。结论脑胶质瘤的ALFF值低于脑炎,对两者的鉴别诊断具有一定的应用价值。展开更多
躯体症状障碍(somatic symptom disorder,SSD)是一种常见的医学疾病,致病原因涉及生物学、心理学及社会因素.目前关于SSD的神经机制知之甚少.本研究通过静息态功能磁共振成像(functional magnetic resonance imaging,fMRI),结合低频振幅...躯体症状障碍(somatic symptom disorder,SSD)是一种常见的医学疾病,致病原因涉及生物学、心理学及社会因素.目前关于SSD的神经机制知之甚少.本研究通过静息态功能磁共振成像(functional magnetic resonance imaging,fMRI),结合低频振幅(amplitudes of low-frequency fluctuation,ALFF)和局部一致性(regional homogeneity,ReHo)分析探究45位SSD患者和43位健康对照自发性脑活动特征的区别.结果发现:与对照组相比,SSD患者右侧扣带回中部的ReHo值显著升高,而右侧楔前叶、左侧颞下回延伸到左侧颞中回和左侧海马旁回、右侧脑桥的ReHo值显著降低.同时,SSD患者扣带回中部延伸至左侧额中回、右侧脑岛延伸至右侧额下回、左侧额中回延伸至左侧前扣带回的ALFF值均显著升高.这些脑区的脑功能与自我加工、情绪处理、身体知觉等有关,与SSD发病机制有重要联系.展开更多
静息态脑区的活动处于一种相对稳定的状态。但是,静息态机能性磁共振成像(functional Magnetic Resonance Imaging,fMRI)实验中,被试者可能会受到各种噪声的影响,因此,统计分析所得到的静息态脑区的活动强度和体素数都可能受此影响。为...静息态脑区的活动处于一种相对稳定的状态。但是,静息态机能性磁共振成像(functional Magnetic Resonance Imaging,fMRI)实验中,被试者可能会受到各种噪声的影响,因此,统计分析所得到的静息态脑区的活动强度和体素数都可能受此影响。为了更进一步研究静息态脑区的活动特点,分别对16名被试采集了8′14″的静息态fMRI数据,将这些数据按照时间等分为5个部分,对每个部分分别采用低频振幅方法进行分析。实验结果显示:楔前叶和后扣带皮层包含活动体素的个数随时间变化较小,处于一种相对稳定的状态;额内侧皮层和顶下小叶中活动体素个数随时间变化差异较大,处于不是很稳定的状态。实验结果表明,静息态脑区中,楔前叶和后扣带皮层对于外界噪声的干扰不敏感,额内侧皮层和顶下小叶对于外界噪声比较敏感。展开更多
目的:探讨身体活动对药物成瘾戒断者抑制能力及静息态脑功能的改善,拟为药物成瘾提供有效的辅助治疗手段。方法:将药物成瘾戒断者按身体活动量分为活动组和久坐组,首先进行Go/NoGo抑制能力测试,然后采集他们的静息态功能磁共振数据。选...目的:探讨身体活动对药物成瘾戒断者抑制能力及静息态脑功能的改善,拟为药物成瘾提供有效的辅助治疗手段。方法:将药物成瘾戒断者按身体活动量分为活动组和久坐组,首先进行Go/NoGo抑制能力测试,然后采集他们的静息态功能磁共振数据。选取静息态的两项重要分析方法——低频振幅(amplitude of low frequency fluctuations,ALFF)和局部一致性(regional homogeneity,ReHo)来探讨身体活动对药物成瘾戒断者脑功能损伤的改善。结果:(1)Go/NoGo测试:活动组NoGo正确率显著高于久坐组。(2)ALFF分析:活动组在双侧脑岛、左侧额下回眶部、双侧额内侧回、左侧前扣带回、右侧背外侧前额叶、左侧枕上回、左侧辅助运动区、双侧内侧扣带回ALFF显著高于久坐组。(3)ReHo分析:活动组在左侧枕中回、双侧背外侧前额叶、左侧辅助运动区ReHo显著高于久坐组。这些显著差异脑区主要与成瘾的抑制能力有关。结论:(1)身体活动能有效地提高药物成瘾戒断者的抑制能力。(2)身体活动是修复药物成瘾戒断者大脑功能损伤的关键因素之一。身体活动可通过增加药物成瘾戒断者静息状态下脑功能的低频振幅和局部一致性,改善药物成瘾戒断者大脑功能损伤。展开更多
目的通过静息态功能磁共振研究早发未用药精神分裂症患者局部脑功能低频振幅(amplitude of low-frequency fluctuation,ALFF)的变化,探讨其静息态下功能异常的脑区。方法收集20例早发未用药精神分裂症患者与20名性别、年龄、受教育年限...目的通过静息态功能磁共振研究早发未用药精神分裂症患者局部脑功能低频振幅(amplitude of low-frequency fluctuation,ALFF)的变化,探讨其静息态下功能异常的脑区。方法收集20例早发未用药精神分裂症患者与20名性别、年龄、受教育年限相匹配的正常对照,分别对其进行全脑静息态功能磁共振扫描,计算ALFF值。结果与对照组相比,患者组左侧额上回、左侧楔前叶、左侧扣带回、左侧枕叶、左侧海马旁回、左侧距状沟ALFF值增高(P<0.05,Alpha Sim校正),右侧颞上回和右侧小脑后叶ALFF值降低(P<0.05,Alpha Sim校正)。结论早发精神分裂症患者在静息态下有多处脑区ALFF值改变,提示其在静息态下存在脑功能异常。展开更多
Objective： Although lithium has been a commonly prescribed neurotrophic/neuroprotective mood-stabilizing agents, its effect on spontaneous brain activity in patients with bipolar depression remains unclear. The aim o...Objective： Although lithium has been a commonly prescribed neurotrophic/neuroprotective mood-stabilizing agents, its effect on spontaneous brain activity in patients with bipolar depression remains unclear. The aim of this study is to reveal the basic mechanism underlying the pathological influences of lithium on resting-state brain function of bipolar depression patients. Methods：97 subjects including 9 bipolar depression patients with lithium treatment, 19 bipolar depression patients without lithium treatment and 69 healthy controls, were recruited to participate in this study. Amplitude of low-frequency fluctuation （ ALFF ） and fractional amplitude of low-frequency fluctuation （ fALFF） were used to capture the changes of spontane-ous brain activity among different groups. In addition, further analysis in terms of Hamilton Depression Rating Scale, the number of depressive episodes, and illness duration in pooled bipolar depression patients were conducted, which combined FLEF and fALEF to identify the basic neural features of bipolar depression patients. Results： It was observed from the imaging results that both the bipolar depression patients receiving lithium treatment and healthy control subjects showed signifi-cantly decreased ALFF/fALFF values in the right anterior cingulate cortex and right middle frontal gyrus compared to that from the bipolar depression patients without lithium treatmetn. The ALFF values of the right＆amp;nbsp;middle temporal gyrus was also found to be negative related to the number of depressive episode and the total episodes. Conclusions：Our findings suggested that the bipolar depression subjects were identified to have ab-normal ALFF/ fALFF in the corticolimbic systems, in-cluding regions like right anterior cingulate cortex, bilateral middle frontal gyrus, right orbital frontal gyrus, and right middle temporal gyrus. In addition, it was also revealed that the decreased ALFF/fALFF in the right anterior cingulate cortex and right middle frontal gyrus might be a biomarker that is related to the lithium effects.展开更多
文摘目的通过测量静息态BOLD-fMRI低频振荡振幅ALFF(amplitude of low-frequency fluctuation)值,分析其在脑胶质瘤、脑炎的健侧与患侧以及正常人群中的改变,探索ALFF值在鉴别诊断脑胶质瘤与脑炎的潜在价值。方法采用前瞻性病例-对照研究,对脑胶质瘤30例,脑炎30例及40名健康志愿者作静息态BOLD-fMRI检查,使用DPARSF软件计算ALFF,获得胶质瘤患侧组(ipsilateral gliomagroup,IGG)、胶质瘤健侧组(contralateral glioma group,CGG)、脑炎患侧组(ipsilatera lencephalitis group,IEG)、脑炎健侧组(contralateral encephalitis group,CEG)和胶质瘤的正常对照组(corresponding areas of glioma in healthy control group,CAGHCG)、脑炎的正常对照组(corresponding areas of encephalitis in health ycontrol group,CAEHCG)的ALFF值。应用独立样本t检验、配对样本t检验及受试者工作特征(receiver operator characteristic curve,ROC)曲线进行统计学分析。结果(1)IGG与CGG、IGG与CAGHCG、IGG与IEG的ALFF值及(IGG-CGG)/IGG与(IEG-CEG)/IEG组间差异具有统计学意义(P<0.01)。(2)IGG与CGG、IGG与IEG的ROC曲线具有很高的AUG、诊断阈值、灵敏度和特异度。结论脑胶质瘤的ALFF值低于脑炎,对两者的鉴别诊断具有一定的应用价值。
文摘目的 证实振腹法的临床疗效,探讨振腹法对寒凝血瘀型原发性痛经(primary dysmenorrhea,PD)患者脑区的影响。方法 以寒凝血瘀型PD患者为研究对象开展小样本临床试验观察,观察振腹法治疗该病的临床疗效。共纳入20例患者参加振腹法治疗,由于5例患者未能规律接受治疗导致脱落,最终确定15例有效数据纳入统计。观察寒凝血瘀型PD患者经过振腹法治疗后疼痛程度评分量表(Visual analogue scale,VAS)评分、COX痛经症状量表(Cox Menstrual Symptom Scale,CMSS)。受试者在第0月经周期(基线期)和第1个月经周期的前3天内各扫描一次静息态功能磁共振成像(resting state functional magnetic resonance imaging,rs-fMRI),第二次扫描时与振腹法治疗同步进行。采用两样本t检验分析寒凝血瘀型PD患者低频振幅(Amplitude of low frequency fluctuation,ALFF)的差异。结果 振腹法治疗寒凝血瘀型PD患者VAS评分结果显示:振腹法治疗前和第1、2、3次治疗后均有明显差异(P<0.01);第1次治疗后与第2次治疗后有差异(P<0.05),与第3次治疗后有明显差异(P<0.01);第2次治疗后和第3次治疗后无差异(P>0.05)。CMSS总发作时间结果显示:振腹法治疗前与第1次治疗后有差异(P<0.05),与第2次和第3次治疗后有明显差异(P<0.01);第1次治疗后与第2次治疗后无差异(P>0.05),与第3次治疗后有差异(P<0.05);第2次治疗后与第3次治疗后无差异(P>0.05)。CMSS平均严重程度结果显示:振腹法治疗前与第1次治疗后有差异(P<0.05),与第2次和第3次治疗后有明显差异(P<0.01);第1次治疗后与第2次和第3次治疗后有差异(P<0.05);第2次治疗后和第3次治疗后无差异(P>0.05)。振腹法治疗后,PD患者右侧壳核、左侧岛叶、右侧小脑脚1区存在组间差异,ALLF值升高。结论 振腹法临床疗效明确,可刺激寒凝血瘀型痛经患者相关脑区的脑神经元活动,为今后的中枢调控机制研究奠定基础。
文摘躯体症状障碍(somatic symptom disorder,SSD)是一种常见的医学疾病,致病原因涉及生物学、心理学及社会因素.目前关于SSD的神经机制知之甚少.本研究通过静息态功能磁共振成像(functional magnetic resonance imaging,fMRI),结合低频振幅(amplitudes of low-frequency fluctuation,ALFF)和局部一致性(regional homogeneity,ReHo)分析探究45位SSD患者和43位健康对照自发性脑活动特征的区别.结果发现:与对照组相比,SSD患者右侧扣带回中部的ReHo值显著升高,而右侧楔前叶、左侧颞下回延伸到左侧颞中回和左侧海马旁回、右侧脑桥的ReHo值显著降低.同时,SSD患者扣带回中部延伸至左侧额中回、右侧脑岛延伸至右侧额下回、左侧额中回延伸至左侧前扣带回的ALFF值均显著升高.这些脑区的脑功能与自我加工、情绪处理、身体知觉等有关,与SSD发病机制有重要联系.
文摘静息态脑区的活动处于一种相对稳定的状态。但是,静息态机能性磁共振成像(functional Magnetic Resonance Imaging,fMRI)实验中,被试者可能会受到各种噪声的影响,因此,统计分析所得到的静息态脑区的活动强度和体素数都可能受此影响。为了更进一步研究静息态脑区的活动特点,分别对16名被试采集了8′14″的静息态fMRI数据,将这些数据按照时间等分为5个部分,对每个部分分别采用低频振幅方法进行分析。实验结果显示:楔前叶和后扣带皮层包含活动体素的个数随时间变化较小,处于一种相对稳定的状态;额内侧皮层和顶下小叶中活动体素个数随时间变化差异较大,处于不是很稳定的状态。实验结果表明,静息态脑区中,楔前叶和后扣带皮层对于外界噪声的干扰不敏感,额内侧皮层和顶下小叶对于外界噪声比较敏感。
文摘目的:探讨身体活动对药物成瘾戒断者抑制能力及静息态脑功能的改善,拟为药物成瘾提供有效的辅助治疗手段。方法:将药物成瘾戒断者按身体活动量分为活动组和久坐组,首先进行Go/NoGo抑制能力测试,然后采集他们的静息态功能磁共振数据。选取静息态的两项重要分析方法——低频振幅(amplitude of low frequency fluctuations,ALFF)和局部一致性(regional homogeneity,ReHo)来探讨身体活动对药物成瘾戒断者脑功能损伤的改善。结果:(1)Go/NoGo测试:活动组NoGo正确率显著高于久坐组。(2)ALFF分析:活动组在双侧脑岛、左侧额下回眶部、双侧额内侧回、左侧前扣带回、右侧背外侧前额叶、左侧枕上回、左侧辅助运动区、双侧内侧扣带回ALFF显著高于久坐组。(3)ReHo分析:活动组在左侧枕中回、双侧背外侧前额叶、左侧辅助运动区ReHo显著高于久坐组。这些显著差异脑区主要与成瘾的抑制能力有关。结论:(1)身体活动能有效地提高药物成瘾戒断者的抑制能力。(2)身体活动是修复药物成瘾戒断者大脑功能损伤的关键因素之一。身体活动可通过增加药物成瘾戒断者静息状态下脑功能的低频振幅和局部一致性,改善药物成瘾戒断者大脑功能损伤。
基金Acknowlegements ： The authors gratefully acknowledge the Beijing Normal University Imaging Center for Brain Research and Prof. Yufeng Zang for their contributions in MRI data acquisition. This study was supported by grants from the Beijing Municipal Science ＆ Technology Commission （Grant no. D121100005012002） , Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support （ Grant no. ZYLX201403） , the National Natural Science Foundation of China （ Grant no. 81471389 ） , the High level health technical personnel in Beijing （ Grant no. 2014 - 3-095）, the MYRG2014 - 00093 - FHS and MYRG 2015-00036- FHS grants from the University of Macao in Macao, and FDCT 026/2014/A1 and FDCT 025/ 2015/A1 grants from Macao government.
文摘Objective： Although lithium has been a commonly prescribed neurotrophic/neuroprotective mood-stabilizing agents, its effect on spontaneous brain activity in patients with bipolar depression remains unclear. The aim of this study is to reveal the basic mechanism underlying the pathological influences of lithium on resting-state brain function of bipolar depression patients. Methods：97 subjects including 9 bipolar depression patients with lithium treatment, 19 bipolar depression patients without lithium treatment and 69 healthy controls, were recruited to participate in this study. Amplitude of low-frequency fluctuation （ ALFF ） and fractional amplitude of low-frequency fluctuation （ fALFF） were used to capture the changes of spontane-ous brain activity among different groups. In addition, further analysis in terms of Hamilton Depression Rating Scale, the number of depressive episodes, and illness duration in pooled bipolar depression patients were conducted, which combined FLEF and fALEF to identify the basic neural features of bipolar depression patients. Results： It was observed from the imaging results that both the bipolar depression patients receiving lithium treatment and healthy control subjects showed signifi-cantly decreased ALFF/fALFF values in the right anterior cingulate cortex and right middle frontal gyrus compared to that from the bipolar depression patients without lithium treatmetn. The ALFF values of the right＆amp;nbsp;middle temporal gyrus was also found to be negative related to the number of depressive episode and the total episodes. Conclusions：Our findings suggested that the bipolar depression subjects were identified to have ab-normal ALFF/ fALFF in the corticolimbic systems, in-cluding regions like right anterior cingulate cortex, bilateral middle frontal gyrus, right orbital frontal gyrus, and right middle temporal gyrus. In addition, it was also revealed that the decreased ALFF/fALFF in the right anterior cingulate cortex and right middle frontal gyrus might be a biomarker that is related to the lithium effects.
