抑郁症首次发病患者静息态脑功能局部一致性的研究

目的 利用功能磁共振(fMRI)和局部一致性(regional homogeneity,ReHo)探讨抑郁症首次发病(以下简称首发)患者在静息态脑功能是否存在异常及异常部位.方法 对34例符合美国精神疾病诊断与统计手册第4版诊断标准的首发抑郁症患者(抑郁症组)和34名性别、年龄、文化程度匹配的健康志愿者(对照组)进行静息态fMRI扫描.结果 抑郁症组静息态脑血氧水平依赖信号的ReHo高于对照组的脑区有左侧额叶眶回、顶下小叶、颞上回,右侧额内侧回、顶下小叶、小脑后叶;低于对照组的脑区有左颞下回、右颞上同和胼胝体、双侧后扣带回(P＜0.005,K≥10).结论首发抑郁症患者在静息态存在多个腩区功能活动的异常,并可能和抑郁症的病理机制有关.     

首发精神分裂症患者静息态脑局部一致性功能性磁共振研究

目的:应用功能性磁共振(f MRI)技术,探讨首发精神分裂症患者静息状态下脑局部一致性(Re Ho)功能变化的特征。方法:对首发未用药精神分裂患者(急性期组)及性别、年龄、受教育年限匹配的经抗精神病药治疗后症状缓解的首发精神分裂症患者(缓解组)各17例,分别进行f MRI扫描,利用Re Ho的方法分析数据,比较两组间Re Ho变化。结果:与急性期组相比,缓解期组表现出右侧颞上回、舌回/梭状回、左侧和右侧额下回、左侧和右侧中央后回、小脑等脑区局部一致性异常,均有统计学意义(P均0.05)。结论:缓解期组较急性期组相比,多个脑区有相应的局部一致性异常,这种脑功能特征的变化,可能与抗精神病药改善症状有关,且可能反映精神分裂症生物内表型的变化。     

腰背痛患者静息态fMRI的脑功能局部一致性研究

目的 利用功能磁共振成像(fMRI)技术探讨静息状态下腰背痛患者脑局部一致性(ReHo)变化的特点. 方法 选择自2011年8月至2012年1月南方医科大学珠江医院康复医学科招募的15例年龄、性别和文化程度相近的健康者作为受试者,向其右侧腰背部肌肉注射0.3 mL30g/L的高渗盐水制造腰背痛模型,采用3.0T MR仪分别在注射前、注射后进行静息状态fMRI扫描,所得数据进行配对t检验,比较疼痛及非疼痛状态下静息态脑功能的局部一致性差异. 结果 与正常状态相比,腰背痛受试者ReHo增高的脑区有:双侧前额叶内侧、左额下回、右额中回、右小脑扁桃体、右脑桥、右岛叶、右尾状核、右楔前叶、右海马旁回、后扣带回;ReHo减低的脑区有:右颞上回、左颞中回、左中央前回、左中央后回、左海马旁回、左梭状回、左前扣带回、左顶上小叶、右顶下小叶(P＜0.005,体素值≥10). 结论 静息状态下腰背痛患者部分脑区存在脑活动区域一致性异常.     

首发未用药精神分裂症患者静息态脑功能局部一致性fMRI研究

目的 通过功能磁共振(functional magnetic resonance imaging,fMRI)技术,探讨首发未用药精神分裂症患者静息状态下脑局部自发神经元活动特征.方法 采用3.0T功能磁共振成像技术检测13例首次发病且未用药的男性精神分裂症患者与13名年龄和受教育年限相匹配的健康男性静息状态下全脑的活动情况.使用SPM8、REST软件结合局部一致性(regional homogeneity,ReHo)方法对影像学数据进行分析.结果 与对照组相比,患者组ReHo降低的脑区为右侧额上回和左侧丘脑,ReHo增高的脑区是右侧颞中回,差异均有统计学意义(P＜0.05).结论 本研究中首发未用药精神分裂症患者存在静息态额叶、颞叶、丘脑功能活动局部一致性异常,ReHo异常可能有助于更好地理解精神分裂症病理机制.     

忧郁型抑郁障碍患者脑区静息态局部一致性的改变

目的 探讨忧郁型抑郁障碍（MD）患者脑区静息态局部一致性（ReHo）的改变特征。 方法 纳入 2019 年 2 月至 2021 年 12 月就诊于山西医科大学第一医院的 26 例忧郁型 MD 患者及同期招 募的 20 名健康对照者为研究对象,行静息态功能磁共振扫描,比较两组 ReHo 差异。采用自制情感障 碍观察表收集受试者一般资料,采用 17 项汉密尔顿抑郁量表（HAMD-17）评估 MD 组的抑郁情况。采用 Pearson 相关分析 MD 患者差异脑区 ReHo 值与 HAMD-17 评分的相关性。结果 MD 组左侧梭状回、壳核 及枕中回 / 枕下回 ReHo 值低于对照组,差异有统计学意义（t=-6.392、-4.540、-5.786;P＜ 0.05）。MD 组 右侧额上回及楔前叶、左侧额中回 / 中央前回 ReHo 值高于对照组,差异有统计学意义（t=4.796、5.185、 5.111;P＜ 0.05）。MD 组左侧梭状回 ReHo 值与阻滞因子得分呈正相关（r=0.397,P＜ 0.05）,右侧楔前 叶 ReHo 值与 HAMD-17 总分、阻滞因子得分及睡眠障碍因子得分呈负相关（r=-0.452、-0.446、-0.411; P＜ 0.05）。进一步控制混杂因素行偏相关分析,MD 患者左侧梭状回 ReHo 值与阻滞因子得分呈正相 关（r=0.437,P＜ 0.05）,右侧楔前叶 ReHo 值与 HAMD-17 总分及睡眠障碍因子得分呈负相关（r=-0.568、 -0.500;P＜ 0.05）。结论 MD 患者多个脑区存在自发脑活动异常,涉及默认网络及奖赏环路,且与其 抑郁严重程度、阻滞症状及睡眠障碍相关。     

临床治愈的抑郁症患者静息态脑功能磁共振研究

目的：利用静息态功能磁共振,结合局部一致性分析方法探讨临床治愈的抑郁患者局部脑功能的改变。方法：对19例临床治愈的抑郁症患者（患者组）和14名健康志愿者（正常对照组）进行功能磁共振扫描,通过双样本t检验比较两组被试者脑区局部一致性。结果：与正常对照组比较,患者组左背内侧前额叶（t=4.070,P<0.01）、左梭状回（t=3.855,P<0.01）局部一致性增高;左颞中回（t=-4.851,P<0.01）、左顶下小叶（t=-4.459,P<0.01）及右楔叶（t=-3.477,P<0.01）局部一致性降低。结论：临床治愈的抑郁症患者存在部分脑区的功能异常。     

精神分裂症患者发病年龄与静息态脑功能局部一致性的关系

目的探讨精神分裂症患者发病年龄与静息态脑功能局部一致性(Re Ho)之间的关系。方法选取19名45~59岁符合《精神障碍诊断与统计手册(第4版)》(DSM-Ⅳ)精神分裂症诊断标准的精神分裂症患者为被试。以发病年龄25岁为分界线,将患者分为25岁之前发病的早期发病患者组9名和25岁之后发病的晚期发病患者组10名,采集静息态功能磁共振数据,对比两组Re Ho值。结果相对于早期发病的精神分裂症患者,晚期发病组大脑右侧额上回处的Re Ho值显著降低(P0.01,簇大小486mm3)。同时,右侧额上回处的Re Ho均值与精神分裂症病程呈正相关,即个体病程越短,该脑区的Re Ho值越低。结论患者发病年龄越早、病程越长,对右侧额上回功能同步性越明显。     

首发抑郁症局部脑区的功能一致性及其与临床症状的关系

目的通过静息态功能磁共振(fMRI),探讨首发抑郁症患者的自发脑活动特征及其与临床症状之间的关系。方法 16例首发未用药的符合DSM-IV诊断标准的重性抑郁障碍(抑郁症)患者和16名正常对照,在静息状态下接受5min12sfMRI扫描。以汉密尔顿抑郁量表(HAMD)评估患者临床症状,以ReHo软件对影像数据进行脑区的自发神经活动功能一致性分析。结果患者组左侧丘脑、左内外侧上颞叶、左侧小脑与枕叶的自发活动局部一致性较对照组减低(P0.01)。患者组上述差异脑区的ReHo值与HAMD总分无相关(P0.05),但左侧丘脑ReHo值与HAMD体重因子分、睡眠障碍因子分相关(r=0.56,P0.05;r=0.58,P0.05),左外侧上颞叶ReHo值与HAMD认知障碍因子分相关(r=0.51,P0.05),左内侧上颞叶ReHo值与HAMD焦虑躯体化因子分、认知障碍因子分相关(r=0.51,P0.05;r=0.53,P0.05)。结论首发抑郁症患者左侧丘脑、左侧上颞叶、左侧小脑与枕叶功能异常,且部分脑区自发活动一致性降低可能与患者某些症状相关。     

抑郁症患者静息状态的功能磁共振成像研究

目的 了解在静息状态下抑郁症患者脑区的局部一致性特点.方法 采用功能磁共振成像(fMRI)技术,检测静息状态下27例抑郁症患者(患者组)和性别、年龄、受教育程度均与患者相匹配的27名正常人(对照组)的脑功能活动,并对两组进行比较.利用局部一致性方法 分析fMRI数据,用SPM2软件进行配对t检验(P＜0.005).结果 与对照组相比,患者组双侧额中回、右额下回、右颞上回、左前扣带回、右后扣带回、右岛叶、双侧豆状核、双侧屏状核、左尾状核局部一致性显著增高(P＜0.005,未校正,体素值＞10);未显示脑区有明显的局部一致性减低.结论 抑郁症患者神经环路脑区局部在静息状态下具有很高的一致性,其局部一致性的增高可能参与了抑郁症的代偿机制.     

重症肌无力患者静息态脑功能研究

目的探索重症肌无力(MG)患者的静息态脑功能情况。方法选择30例MG患者,以及性别、年龄和文化程度相匹配的20例正常对照组(NC)进行静息态功能磁共振成像(rs-fMRI)扫描。采用局部一致性(ReHo)方法,分析计算MG组和NC组的ReHo改变的脑区,并比较两组间ReHo值差异,从而探索MG患者脑功能ReHo的变化情况。结果与NC相比,MG组在双侧小脑、双侧尾状核等脑区ReHo值下降。结论可通过静息态功能磁共振的角度研究MG患者的脑功能变化。     

Expertise modulates local regional homogeneity of spontaneous brain activity in the resting brain: An fMRI study using the model of skilled acupuncturists

Studies on training/expertise‐related effects on human brain in context of neuroplasticity have revealed that plastic changes modulate not only task activations but also patterns and strength of internetworks and intranetworks functional connectivity in the resting state. Much has known about plastic changes in resting state on global level; however, how training/expertise‐related effect affects patterns of local spontaneous activity in resting brain remains elusive. We investigated the homogeneity of local blood oxygen level‐dependent fluctuations in the resting state using a regional homogeneity (ReHo) analysis among 16 acupuncturists and 16 matched nonacupuncturists (NA). To prove acupuncturists' expertise, we used a series of psychophysical tests. Our results demonstrated that, acupuncturists significantly outperformed NA in tactile‐motor and emotional regulation domain and the acupuncturist group showed increased coherence in local BOLD signal fluctuations in the left primary motor cortex (MI), the left primary somatosensory cortex (SI) and the left ventral medial prefrontal cortex/orbitofrontal cortex (VMPFC/OFC). Regression analysis displayed that, in the acupuncturists group, ReHo of VMPFC/OFC could predict behavioral outcomes, evidenced by negative correlation between unpleasantness ratings and ReHo of VMPFC/OFC and ReHo of SI and MI positively correlated with the duration of acupuncture practice. We suggest that expertise could modulate patterns of local resting state activity by increasing regional clustering strength, which is likely to contribute to advanced local information processing efficiency. Our study completes the understanding of neuroplasticity changes by adding the evidence of local resting state activity alterations, which is helpful for elucidating in what manner training effect extends beyond resting state. Hum Brain Mapp 35:1074–1084, 2014. © 2013 Wiley Periodicals, Inc.     

帕金森静止性震颤者脑局部一致性的功能磁共振评价

Regional homogeneity analysis of low-frequency blood oxygenation level-dependent signals from neighboring voxels enables the analysis of local neuronal synchrony. Both structural magnetic resonance imaging and resting-state functional magnetic resonance imaging scans were collected from nine Parkinson’s disease patients with right resting tremor, and from eight age-matched normal controls. Regional homogeneity was compared between Parkinson’s disease patients and controls. The results revealed that regional homogeneity was increased in several brain regions, including the right precuneus, right superior parietal gyrus, left anterior cingulate cortex, right middle frontal gyrus and right inferior frontal gyrus. Conversely, regional homogeneity was decreased in the cerebellar vermis in Parkinson’s disease patients compared with healthy controls.     

Disrupted regional homogeneity in treatment-resistant depression: a resting-state fMRI study

Background

Using a newly developed regional homogeneity (ReHo) approach, we were to explore the features of brain activity in patients with treatment-resistant depression (TRD) in resting state, and further to examine the relationship between abnormal brain activity in TRD patients and specific symptom factors derived from ratings on the Hamilton Rating Scale for Depression (HRSD).

Methods

24 patients with TRD and 19 gender-, age-, and education-matched healthy subjects participated in the fMRI scans.

Results

1.

Compared with healthy controls, decreased ReHo were found in TRD patients in the left insula, superior temporal gyrus, inferior frontal gyrus, lingual gyrus and cerebellum anterior lobe (culmen) (p < 0.05, corrected).

2.

Compared with healthy controls, increased ReHo were found in the left superior temporal gyrus, cerebellum posterior lobe (tuber), cerebellum anterior lobe (culmen), the right cerebellar tonsil and bilateral fusiform gyrus (p < 0.05, corrected).

3.

There was no correlation between the ReHo values in any brain region detected in our study and the patients' age, years of education, illness duration, HRSD total score and its symptom factors.

Limitation

The influence of antidepressants to the brain activity in TRD patients was not fully eliminated.

Conclusions

The pathogenesis of TRD may be attributed to abnormal neural activity in multiple brain regions.     

Decreased regional homogeneity in schizophrenia: a resting state functional magnetic resonance imaging study

We used a newly reported regional homogeneity approach to measure the temporal homogeneity of blood oxygen level-dependent signal for exploring the brain activity of schizophrenia in a resting state. The results showed decreased regional homogeneity in schizophrenia, which distributed over the bilateral frontal, temporal, occipital, cerebellar posterior, right parietal and left limbic lobes, similar to the findings reported in previous resting state functional studies. The brain regions that showed decreased regional homogeneity are believed to be involved in the psychopathology and pathophysiology of schizophrenia. Our results indicate that abnormal brain activity of schizophrenia may exist in a resting state and the regional homogeneity may be potentially helpful in understanding the resting state of schizophrenia.     

Alterations in regional homogeneity of resting-state brain activity in internet gaming addicts

ABSTRACT: BackgroundsInternet gaming addiction (IGA), as a subtype of internet addiction disorder, is rapidly becoming a prevalent mental health concern around the world. The neurobiological underpinnings of IGA should be studied to unravel the potential heterogeneity of IGA. This study investigated the brain functions in IGA patients with resting-state fMRI. METHODS: Fifteen IGA subjects and fourteen healthy controls participated in this study. Regional homogeneity (ReHo) measures were used to detect the abnormal functional integrations. RESULTS: Comparing to the healthy controls, IGA subjects show enhanced ReHo in brainstem, inferior parietal lobule, left posterior cerebellum, and left middle frontal gyrus. All of these regions are thought related with sensory-motor coordination. In addition, IGA subjects show decreased ReHo in temporal, occipital and parietal brain regions. These regions are thought responsible for visual and auditory functions. CONCLUSIONS: Our results suggest that long-time online game playing enhanced the brain synchronization in sensory-motor coordination related brain regions and decreased the excitability in visual and auditory related brain regions.