The human K-complex represents an isolated cortical down-state.

The human K-complex represents an isolated cortical down-state.
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DOI:
10.1126/science.1169626
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发表时间:
2009-05-22
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Ulbert I
Ulbert I
中科院分区:
其他
文献类型:
--
作者:
Cash SS;Halgren E;Dehghani N;Rossetti AO;Thesen T;Wang C;Devinsky O;Kuzniecky R;Doyle W;Madsen JR;Bromfield E;Eross L;Halász P;Karmos G;Csercsa R;Wittner L;Ulbert I

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脑电(EEG)是临床神经学的支柱,与脑功能密切相关,但由于缺乏微生理记录,产生人类EEG元素的特定电流仍然很难确定。健康人脑电中最大的事件是K-复合体(KC),它发生在慢波睡眠中。在这里,我们发现在广泛的皮质区域,KCs是由中上层的树突电流产生的,伴随着宽带脑电功率的降低和神经元放电的减少,这表明网络活动急剧下降。因此,KCs是孤立的“下状态”,这是一种基本的皮质-丘脑处理模式,已经在动物身上表现出来。这一对应与KC对睡眠保护和记忆巩固的拟议贡献是一致的。
The electroencephalogram (EEG) is a mainstay of clinical neurology and is tightly correlated with brain function, but the specific currents generating human EEG elements remain poorly specified because of a lack of microphysiological recordings. The largest event in healthy human EEGs is the K-complex (KC), which occurs in slow-wave sleep. Here, we show that KCs are generated in widespread cortical areas by outward dendritic currents in the middle and upper cortical layers, accompanied by decreased broadband EEG power and decreased neuronal firing, which demonstrate a steep decline in network activity. Thus, KCs are isolated “down-states,” a fundamental cortico-thalamic processing mode already characterized in animals. This correspondence is compatible with proposed contributions of the KC to sleep preservation and memory consolidation.
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