Biomedical Engineering Group. Department of Electronics, Universidad de Alcalá. Plaza de San Diego, s/n 28801 Alcalá de Henares, Spain.
Sensors (Basel). 2020 Mar 11;20(6):1545. doi: 10.3390/s20061545.
The purpose of this paper is to record and analyze induced gamma-band activity (GBA) (30-60 Hz) in cerebral motor areas during imaginary movement and to compare it quantitatively with activity recorded in the same areas during actual movement using a simplified electroencephalogram (EEG). Brain activity (basal activity, imaginary motor task and actual motor task) is obtained from 12 healthy volunteer subjects using an EEG (Cz channel). GBA is analyzed using the mean power spectral density (PSD) value. Event-related synchronization (ERS) is calculated from the PSD values of the basal GBA (GBAb), the GBA of the imaginary movement (GBAim) and the GBA of the actual movement (GBAac). The mean GBAim and GBAac values for the right and left hands are significantly higher than the GBAb value (p = 0.007). No significant difference is detected between mean GBA values during the imaginary and actual movement (p = 0.242). The mean ERS values for the imaginary movement (ERSimM (%) = 23.52) and for the actual movement (ERSacM = 27.47) do not present any significant difference (p = 0.117). We demonstrated that ERS could provide a useful way of indirectly checking the function of neuronal motor circuits activated by voluntary movement, both imaginary and actual. These results, as a proof of concept, could be applied to physiology studies, brain-computer interfaces, and diagnosis of cognitive or motor pathologies.
本文旨在记录和分析大脑运动区域在想象运动时产生的诱导γ 波段活动（GBA）（30-60Hz），并使用简化脑电图（EEG）将其与实际运动时记录到的活动进行定量比较。通过使用 EEG（Cz 通道），从 12 名健康志愿者的大脑活动（基础活动、想象运动任务和实际运动任务）中获取 GBA。使用平均功率谱密度（PSD）值分析 GBA。通过基础 GBA（GBAb）、想象运动的 GBA（GBAim）和实际运动的 GBA（GBAac）的 PSD 值计算事件相关同步（ERS）。右手和左手的平均 GBAim 和 GBAac 值明显高于 GBAb 值（p=0.007）。想象运动和实际运动期间的平均 GBA 值之间未检测到显著差异（p=0.242）。想象运动的平均 ERS 值（ERSimM（%）=23.52）和实际运动的平均 ERS 值（ERSacM=27.47）之间没有显著差异（p=0.117）。我们证明 ERS 可以提供一种有用的方法来间接检查由自愿运动激活的神经元运动回路的功能，包括想象运动和实际运动。这些结果作为概念验证，可以应用于生理学研究、脑机接口和认知或运动病理学的诊断。
