Amzica F, Steriade M
Laboratoire de Neurophysiologie, Faculté de Médecine, Université Laval, Quebec, PQ, Canada.
Neurology. 1997 Oct;49(4):952-9. doi: 10.1212/wnl.49.4.952.
The K-complex is a major graphoelement of sleep EEG. This report demonstrates that K-complexes emerge from a cortically generated slow (<1-Hz) oscillation. Human EEG as well as cat cellular and field potential recordings converge into demonstrating that the K-complex results from a synchronized cortical network that imposes periodic excitatory and inhibitory actions on cortical neurons. We additionally show the correspondence between neuronal activities and the shape of the K-complex. Spectral analysis confirms the periodic recurrence of human K-complexes, with main peaks at 0.5 to 0.7 Hz. It is also shown that the spectral content in the delta band (1 to 4 Hz) is partially due to the shape and duration of the K-complex.
K复合波是睡眠脑电图的主要图形元素。本报告表明，K复合波源自皮层产生的缓慢（<1赫兹）振荡。人类脑电图以及猫的细胞和场电位记录均表明，K复合波是由一个同步的皮层网络产生的，该网络对皮层神经元施加周期性的兴奋性和抑制性作用。我们还展示了神经元活动与K复合波形状之间的对应关系。频谱分析证实了人类K复合波的周期性重现，主峰在0.5至0.7赫兹。研究还表明，δ波段（1至4赫兹）的频谱成分部分归因于K复合波的形状和持续时间。
