Significance of High-frequency Electrical Brain Activity.

IF 0.6 4区 医学 Q4 MEDICINE, RESEARCH & EXPERIMENTAL Acta medica Okayama Pub Date : 2017-06-01 DOI:10.18926/AMO/55201
Katsuhiro Kobayashi, Tomoyuki Akiyama, Takashi Agari, Tatsuya Sasaki, Takashi Shibata, Yoshiyuki Hanaoka, Mari Akiyama, Fumika Endoh, Makio Oka, Isao Date
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引用次数: 11

Abstract

 Electroencephalogram (EEG) data include broadband electrical brain activity ranging from infra-slow bands (< 0.1 Hz) to traditional frequency bands (e.g., the approx. 10 Hz alpha rhythm) to high-frequency bands of up to 500 Hz. High-frequency oscillations (HFOs) including ripple and fast ripple oscillations (80-200 Hz and>200 / 250 Hz, respectively) are particularly of note due to their very close relationship to epileptogenicity, with the possibility that they could function as a surrogate biomarker of epileptogenicity. In contrast, physiological high-frequency activity plays an important role in higher brain functions, and the differentiation between pathological / epileptic and physiological HFOs is a critical issue, especially in epilepsy surgery. HFOs were initially recorded with intracranial electrodes in patients with intractable epilepsy as part of a long-term invasive seizure monitoring study. However, fast oscillations (FOs) in the ripple and gamma bands (40-80 Hz) are now noninvasively detected by scalp EEG and magnetoencephalography, and thus the scope of studies on HFOs /FOs is rapidly expanding.

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高频脑电活动的意义。
脑电图(EEG)数据包括从次慢频段(< 0.1 Hz)到传统频段(例如,约0.1 Hz)的宽带脑电活动。10hz α节奏)到高达500hz的高频频段。高频振荡(hfo),包括纹波振荡和快速纹波振荡(分别为80-200 Hz和>200 / 250 Hz),由于它们与致痫性的关系非常密切,因此特别值得注意,它们有可能作为致痫性的替代生物标志物。相反,生理性高频活动在高级脑功能中起着重要作用,病理性/癫痫性和生理性高频活动的区分是一个关键问题,特别是在癫痫手术中。作为一项长期侵入性癫痫监测研究的一部分,hfo最初是在难治性癫痫患者中用颅内电极记录的。然而,在纹波和伽马波段(40-80 Hz)的快速振荡(FOs)现在可以通过头皮脑电图和脑磁图无创检测到,因此对HFOs /FOs的研究范围正在迅速扩大。
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来源期刊
Acta medica Okayama
Acta medica Okayama 医学-医学:研究与实验
CiteScore
1.00
自引率
0.00%
发文量
110
审稿时长
6-12 weeks
期刊介绍: Acta Medica Okayama (AMO) publishes papers relating to all areas of basic and clinical medical science. Papers may be submitted by those not affiliated with Okayama University. Only original papers which have not been published or submitted elsewhere and timely review articles should be submitted. Original papers may be Full-length Articles or Short Communications. Case Reports are considered if they describe significant and substantial new findings. Preliminary observations are not accepted.
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