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在健康成年人经直流刺激期间和之后,静止状态功能性MRI连接的变化

Amy E Bouchard¹, Emmanuelle Renauld¹, Shirley Fecteau¹

¹Department of Psychiatry and Neurosciences, Faculty of Medicine, CERVO Brain Research Centre, Centre intégré universitaire en santé et services sociaux de la Capitale-Nationale, Université Laval, Québec City, QC, Canada.

Frontiers in human neuroscience

|August 7, 2023

概括

在左脊侧前额皮质 (DLPFC) 上进行的跨直流刺激 (tDCS) 在刺激期间和之后改变了静止状态功能连接 (rs-fcMRI). 基线rs-fcMRI预测了这些tDCS诱导的变化,这表明它有可能优化刺激反应.

科学领域:

神经科学是一个神经科学.
认知神经科学认知神经科学
大脑刺激大脑刺激

背景情况:

经直流刺激 (tDCS) 通过背侧前额皮层 (DLPFC) 调制影响行为.
对tDCS对大脑连接的精确机制仍然不完全理解.
休息状态功能连接 (rs-fcMRI) 为大脑网络动态提供了一个窗口.

研究的目的:

研究单个tDCS会话对双边DLPFC对健康成年人rs-fcMRI的影响.
为了确定基线 rs-fcMRI 预测 tDCS 诱导的功能连接的变化.
在刺激期间和之后探索tDCS对大脑网络影响的时间动态.

主要方法:

随机,假冒控制,双盲,交叉设计.
30分钟的tDCS在1mA时,阳极在左侧是DLPFC,阴极在右侧是DLPFC.
在刺激前,刺激期间和刺激后获得的rs-fcMRI数据的种子分析,用3x2ANOVA分析.

主要成果:

对左侧DLPFC种子观察到显著的时间x刺激相互作用,表明tDCS调节连接.
与假的相比,tDCS在刺激期间和之后改变了左侧DLPFC和广泛的额头,头顶和尾顶区域之间的rs-fcMRI.
特定网络的基线rs-fcMRI预测了刺激期间和之后tDCS诱导的连接性变化.

结论:

tDCS在阳极的近距离和远距离区域调节rs-fcMRI,刺激后的效果仍然存在.
在tDCS前的rs-fcMRI是对tDCS个体反应的潜在预测器.
纳入rs-fcMRI可能会增强针对目标结果的tDCS协议的优化.

关键词:

在 DLPFCFC 中,同时进行的tDCS-fMRI.功能连接性的功能连接性健康的成年人,健康的成年人.顶层皮质 (parietal cortex) 是一个表面皮质.

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