Ratti Elena, Waninger Shani, Berka Chris, Ruffini Giulio, Verma Ajay
BiogenCambridge, MA, United States.
Advanced Brain Monitoring, Inc.Carlsbad, CA, United States.
Front Hum Neurosci. 2017 Aug 3;11:398. doi: 10.3389/fnhum.2017.00398. eCollection 2017.
To compare quantitative EEG signal and test-retest reliability of medical grade and consumer EEG systems. Resting state EEG was acquired by two medical grade (B-Alert, Enobio) and two consumer (Muse, Mindwave) EEG systems in five healthy subjects during two study visits. EEG patterns, power spectral densities (PSDs) and test/retest reliability in eyes closed and eyes open conditions were compared across the four systems, focusing on Fp1, the only common electrode. Fp1 PSDs were obtained using Welch's modified periodogram method and averaged for the five subjects for each visit. The test/retest results were calculated as a ratio of Visit 1/Visit 2 Fp1 channel PSD at each 1 s epoch. B-Alert, Enobio, and Mindwave Fp1 power spectra were similar. Muse showed a broadband increase in power spectra and the highest relative variation across test-retest acquisitions. Consumer systems were more prone to artifact due to eye blinks and muscle movement in the frontal region. EEG data can be successfully collected from all four systems tested. Although there was slightly more time required for application, medical systems offer clear advantages in data quality, reliability, and depth of analysis over the consumer systems. This evaluation provides evidence for informed selection of EEG systemsappropriate for clinical trials.
比较医用级和消费级脑电图（EEG）系统的定量脑电图信号及重测信度。在两次研究访视期间，使用两个医用级（B-Alert、Enobio）和两个消费级（Muse、Mindwave）EEG系统，对五名健康受试者采集静息状态脑电图。比较了四个系统在闭眼和睁眼条件下的脑电图模式、功率谱密度（PSD）以及重测信度，重点关注唯一的公共电极Fp1。使用 Welch 修正周期图法获得 Fp1 的 PSD，并对每次访视的五名受试者进行平均。重测结果计算为每次1秒时段内第1次访视/第2次访视Fp1通道PSD的比值。B-Alert、Enobio和Mindwave的Fp1功率谱相似。Muse显示功率谱呈宽带增加，且在重测采集过程中的相对变化最大。消费级系统更容易因额叶区域的眨眼和肌肉运动而产生伪迹。可以从所有四个测试系统成功收集EEG数据。尽管应用所需时间略长，但与消费级系统相比，医用系统在数据质量、可靠性和分析深度方面具有明显优势。该评估为明智选择适用于临床试验的EEG系统提供了依据。
