Pre-seizure state identified by diffuse optical tomography.

Pre-seizure state identified by diffuse optical tomography.
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DOI:
10.1038/srep03798
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发表时间:
2014-01-21
期刊:
影响因子:
4.6
通讯作者:
Jiang H
Jiang H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhang T;Zhou J;Jiang R;Yang H;Carney PR;Jiang H

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在癫痫中,检测癫痫发作前发生的大脑活动的早期变化并绘制其起源和演变以进行可能的干预一直具有挑战性。在这里,我们证明了使用大鼠模型的全身性癫痫,扩散光学断层扫描(DOT)提供了一个独特的功能性神经成像方式,无创和连续跟踪这样的大脑活动,具有高时空分辨率。我们在脑电图癫痫发作前几分钟检测到了具有异质模式的早期血流动力学反应,以及沿着颅内脑电图伽马功率变化,支持了“癫痫发作前”状态的存在。我们还观察到局部血流动力学和神经活动之间的脱钩。我们发现广泛的血流动力学变化从局部区域的双边皮质和丘脑发展到整个大脑,这表明全身性癫痫发作可能起源于局部,而不是弥漫性的。总之,这些发现表明DOT是绘制早期癫痫发作和传播途径的有力工具。
In epilepsy it has been challenging to detect early changes in brain activity that occurs prior to seizure onset and to map their origin and evolution for possible intervention. Here we demonstrate using a rat model of generalized epilepsy that diffuse optical tomography (DOT) provides a unique functional neuroimaging modality for noninvasively and continuously tracking such brain activities with high spatiotemporal resolution. We detected early hemodynamic responses with heterogeneous patterns, along with intracranial electroencephalogram gamma power changes, several minutes preceding the electroencephalographic seizure onset, supporting the presence of a “pre-seizure” state. We also observed the decoupling between local hemodynamic and neural activities. We found widespread hemodynamic changes evolving from local regions of the bilateral cortex and thalamus to the entire brain, indicating that the onset of generalized seizures may originate locally rather than diffusely. Together, these findings suggest DOT represents a powerful tool for mapping early seizure onset and propagation pathways.
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