Behavioural Brain Research :从静息态fMRI和EEG研究厌恶的自发脑活动

2021-01-28 MedSci原创 MedSci原创

厌恶是一种基本情绪,。研究表明,几乎每个人对厌恶的体验都有消极的反应,而且这种情绪体验在大多数人中普遍存在。厌恶的起源可能与环境因素有,这种反应可能是儿童通过言语和行为习得的。另一种观点认为,基因和童

厌恶是一种基本情绪,。研究表明,几乎每个人对厌恶的体验都有消极的反应,而且这种情绪体验在大多数人中普遍存在。厌恶的起源可能与环境因素有,这种反应可能是儿童通过言语和行为习得的。另一种观点认为,基因和童年的社会经历可能起着至关重要的作用。厌恶与焦虑相关的精神疾病之间有着密切的联系。厌恶测量工具包括厌恶量表(DS及其修订版。自从厌恶敏感的概念被提出以来。厌恶敏感性高的人通常对混乱的刺激表现出更强的反应,厌恶敏感性被认为是各种焦虑的危险因素。有必要探讨不同厌恶敏感水平个体的自发脑活动模式,以加深对厌恶及其与精神疾病关系的认识。

所有受试者均由两名高级精神科医师根据DSM-IV结构化临床访谈进行评估。每个参与者的厌恶敏感度水平使用厌恶量表-修订版(DS-R)进行评估。DS-R因其较高的信度和效度而被广泛应用。25项DS-R分为两部分,包括13项真假项目和12项按3分制评分的项目。这12个项目评估了参与者对这种经历的厌恶程度:完全不厌恶(0)、轻微厌恶(1)或非常厌恶(2)。fMRI图像是由一名熟练的技术人员用3.0T西门子扫描仪(Trio Tim,Erlangen,德国)采集的。首先,使用T1加权序列获取每个参与者的高分辨率结构图像。利用脑成像数据处理与分析(DPABI)工具箱对静息状态图像进行处理。利用静息态fMRI数据分析工具(REST)计算低频波动幅度(ALFF)。首先,利用快速傅立叶变换算法将时间序列转换到频域,得到功率谱,并计算出功率谱的平方根。然后,计算每个体素在0.01 Hz和0.08 Hz之间的平均功率谱。

脑电受试者均由两位资深精神科医师根据DSM-IV结构化临床访谈进行评估。受试者填写DS-R,然后收集他们的静息脑电图数据。本实验使用了由Neuroscan制作的64通道EEG设备进行数据采集。EEGLAB是一个在MATLAB环境下运行的开源工具箱,利用内部MATLAB函数对脑电数据进行预处理。首先对脑电数据进行预处理,去除面部电极和部分漂移较大的数据,采用球面样条插值方法对激活不良的脑电通道进行插值,然后对连续的脑电数据进行0.5~80hz的带通滤波。本实验计算了每个时间点的全局场功率(GFP),即地形图中每个时间点所有电极电压值的标准差。

DS-R评分与右额上回的大脑自发活动呈正相关(MNI坐标:21,-6,72;峰值强度:-0.42;GRF校正,聚类水平P<0.01,体素水平P<0.005)。DS-R评分与ALFF测量的的大脑自发活动呈负相关。265名脑电参与者被纳入研究,平均DS-R得分为16.03±3.87。排除年龄和性别的影响后,本研究结果显示,DS-R评分与C类的校正时长(R = 0.221,P < 0.001)、C类的发生率(R = 0.229,P < 0.001)和C类的贡献率(R = 0.365,P < 0.001)呈显著正相关。上额叶皮层的活动与厌恶感水平呈正相关。ERP研究分析发现,运动抑制过程与上额叶皮层有关。功能磁共振研究提供了小脑参与情绪处理的证据。

Fig. 2

我们采用静息fMRI和静息EEG两种脑成像技术来揭示与厌恶敏感性密切相关的自发脑活动模式。研究结果表明,初步努力揭示厌恶敏感性的神经基础及其与精神病理学的联系。未来还需要通过脑损伤/虚拟脑损伤(无创性脑刺激)和纵向随访研究,进一步了解厌恶敏感性的神经基础及其与精神疾病的关联。

Li Z , Li Y , Li X , et al. The Spontaneous Brain Activity of Disgust: Perspective from Resting State fMRI and Resting State EEG[J]. Behavioural Brain Research, 2021(Suppl 4):113135.

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    2021-03-16 仁医06
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    2021-01-30 qjddjq
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    2021-01-30 yangshch
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    2021-01-29 metal分析

    学习到了新知识!

    0

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    2021-01-29 146aff40m92暂无昵称

    学习到了新知识

    0

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    2021-01-28 1209e435m98(暂无昵称)

    学习了,谢谢分享

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