Faculty of Health Sciences, Aomori University of Health and Welfare, Aomori 030-8505, Japan.
Faculty of Health Sciences, Aomori University of Health and Welfare, Aomori 030-8505, Japan.
Neurosci Lett. 2023 Feb 16;797:137079. doi: 10.1016/j.neulet.2023.137079. Epub 2023 Jan 16.
In animal models, oscillations of local field potentials are entrained by nasal respiration at the frequency of breathing cycle in olfactory brain regions, such as the olfactory bulb and piriform cortex, as well as in the other brain regions. Studies in humans also confirmed these respiration-entrained oscillations in several brain regions using intracranial electroencephalogram (EEG). Here we extend these findings by analyzing coherence between cortical activity and respiration using high-density scalp EEG in twenty-seven healthy human subjects. Results indicated the occurrence of significant coherence between scalp EEG and respiration signals, although the number and locations of electrodes showing significant coherence were different among subjects. These findings suggest that scalp EEG can detect respiration-entrained oscillations. It remained to be determined whether these oscillations are volume conducted from the olfactory brain regions or reflect the local cortical activity.
在动物模型中，局部场电位的振荡在嗅觉脑区（如嗅球和梨状皮层）以及其他脑区中被鼻腔呼吸以呼吸周期的频率所诱导。使用颅内脑电图（EEG），在人类中的研究也证实了这些呼吸诱导的振荡。在这里，我们通过在 27 名健康人类受试者中使用高密度头皮 EEG 分析皮质活动与呼吸之间的相干性，扩展了这些发现。结果表明，头皮 EEG 与呼吸信号之间存在显著的相干性，尽管在不同的受试者中显示出显著相干性的电极的数量和位置不同。这些发现表明头皮 EEG 可以检测到呼吸诱导的振荡。仍有待确定这些振荡是否是从嗅觉脑区容积传导的，还是反映局部皮质活动的。
