Tractography-activation models applied to subcallosal cingulate deep brain stimulation.

Tractography-activation models applied to subcallosal cingulate deep brain stimulation.
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DOI:
10.1016/j.brs.2013.03.008
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发表时间:
2013-09
期刊:
影响因子:
7.7
通讯作者:
McIntyre, Cameron C.
McIntyre, Cameron C.
中科院分区:
医学1区
文献类型:
--
作者:
Lujan, J. Luis;Chaturvedi, Ashutosh;Choi, Ki Sueng;Holtzheimer, Paul E.;Gross, Robert E.;Mayberg, Helen S.;McIntyre, Cameron C.

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胼胝体下扣带白色物质脑深部电刺激(DBS)是一种治疗抑郁症的实验性疗法。介导DBS的抗癫痫作用的特定轴突通路仍然未知。患者特异性纤维束描记激活模型(TAM)是一种新的工具,以帮助识别由DBS调制的通路。TAM由四个基本组成部分组成:1)在患者身上采集的解剖和弥散加权成像数据; 2)来自植入DBS电极周围脑区的概率性纤维束成像; 3)由患者特定DBS参数设置生成的电场的有限元模型; 4)将DBS电场应用于轴突的多隔室电缆模型,其中轨迹由纤维束描记术限定,来预测特定通路中动作电位的产生。本研究介绍了一名MDD患者SCCWM DBS的TAM预测。我们的研究结果表明,电极位置的微小差异可以在直接激活的通路中产生实质性差异。
Deep brain stimulation (DBS) of the subcallosal cingulate white matter (SCCWM) is an experimental therapy for major depressive disorder (MDD). The specific axonal pathways that mediate the anti-depressant effects of DBS remain unknown. Patient-specific tractography-activation models (TAMs) are a new tool to help identify pathways modulated by DBS. TAMs consist of four basic components: 1) anatomical and diffusion-weighted imaging data acquired on the patient; 2) probabilistic tractography from the brain region surrounding the implanted DBS electrode; 3) finite element models of the electric field generated by the patient-specific DBS parameter settings; 4) application of the DBS electric field to multi-compartment cable models of axons, with trajectories defined by the tractography, to predict action potential generation in specific pathways. This study presents TAM predictions from DBS of the SCCWM in one MDD patient. Our findings suggest that small differences in electrode location can generate substantial differences in the directly activated pathways.
DOI: 10.1002/hbm.21262
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