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Correlation of invasive EEG and scalp EEG

机译：侵袭性脑电图与头皮脑电图的相关性

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Ever since the implementation of invasive EEG recordings in the clinical setting, it has been perceived that a considerable proportion of epileptic discharges present at a cortical level are missed by routine scalp EEG recordings. Several in vitro, in vivo, and simulation studies have been performed in the past decades aiming to clarify the interrelations of cortical sources with their scalp and invasive EEG correlates. The amplitude ratio of cortical potentials to their scalp EEG correlates, the extent of the cortical area involved in the discharge, as well as the localization of the cortical source and its geometry have been each independently linked to the recording of the cortical discharge with scalp electrodes. The need to elucidate these interrelations has been particularly imperative in the field of epilepsy surgery with its rapidly growing EEG-based localization technologies. Simultaneous multiscale EEG recordings with scalp, subdural and/or depth electrodes, applied in presurgical epilepsy workup, offer an excellent opportunity to shed some light to this fundamental issue. Whereas past studies have considered predominantly neocortical sources in the context of temporal lobe epilepsy, current investigations have included deep sources, as in mesial temporal epilepsy, as well as extratemporal sources. Novel computational tools may serve to provide surrogates for the shortcomings of EEG recording methodology and facilitate further developments in modern electrophysiology. (C) 2016 British Epilepsy Association. Published by Elsevier Ltd. All rights reserved.
机译：自从在临床环境中实施侵入性脑电图记录以来，人们已经意识到常规头皮脑电图记录会错过皮质水平存在的相当比例的癫痫放电。在过去的几十年中，已经进行了几项体外，体内和模拟研究，旨在阐明皮质来源与头皮和浸润性脑电图相关性的相互关系。皮层电势与其头皮EEG的振幅比，放电所涉及的皮层区域的范围以及皮层源的位置及其几何形状均相互关联，每个都与使用头皮电极记录皮层放电有关。阐明这些相互关系的需求在其快速增长的基于EEG的定位技术的癫痫外科领域中尤其重要。带有头皮，硬膜下和/或深度电极的同时多尺度脑电图记录，应用于术前癫痫检查，为阐明这一基本问题提供了极好的机会。尽管过去的研究在颞叶癫痫的背景下主要考虑了新皮层来源，但目前的研究已包括深层来源，如中颞叶癫痫，以及颞外来源。新颖的计算工具可用于为EEG记录方法的不足提供替代方案，并促进现代电生理学的进一步发展。 （C）2016英国癫痫病协会。由Elsevier Ltd.出版。保留所有权利。

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