Department of Psychology, Faculty of Science, University of Alberta, Canada.
Department of Psychology, Faculty of Science, University of Alberta, Canada; Neuroscience and Mental Health Institute, University of Alberta, Canada.
Brain Res. 2019 Aug 1;1716:50-61. doi: 10.1016/j.brainres.2017.12.010. Epub 2017 Dec 14.
Mobile EEG allows the investigation of brain activity in increasingly complex environments. In this study, EEG equipment was adapted for use and transportation in a backpack while cycling. Participants performed an auditory oddball task while cycling outside and sitting in an isolated chamber inside the lab. Cycling increased EEG noise and marginally diminished alpha amplitude. However, this increased noise did not influence the ability to measure reliable event related potentials (ERP). The P3 was similar in topography, and morphology when outside on the bike, with a lower amplitude in the outside cycling condition. There was only a minor decrease in the statistical power to measure reliable ERP effects. Unexpectedly, when biking outside significantly decreased P2 and increased N1 amplitude were observed when evoked by both standards and targets compared with sitting in the lab. This may be due to attentional processes filtering the overlapping sounds between the tones used and similar environmental frequencies. This study established methods for mobile recording of ERP signals. Future directions include investigating auditory P2 filtering inside the laboratory.
移动脑电图允许在越来越复杂的环境中研究大脑活动。在这项研究中，脑电图设备经过改装，可以在背包中使用和运输，同时还可以在骑自行车时使用。参与者在户外骑自行车和在实验室的隔离室内坐着时进行听觉Oddball 任务。骑自行车会增加脑电图噪声，并略微降低 alpha 波幅度。然而，这种增加的噪声并没有影响测量可靠事件相关电位（ERP）的能力。P3 在外部骑车时的地形和形态相似，但其幅度在外骑车条件下较低。测量可靠 ERP 效应的统计功效仅略有下降。出乎意料的是，当在户外骑车时，与在实验室坐着相比，无论是标准刺激还是靶刺激，都观察到 P2 显著降低，N1 幅度显著增加。这可能是由于注意力过程过滤了所用音调和类似环境频率之间的重叠声音。本研究建立了移动记录 ERP 信号的方法。未来的研究方向包括在实验室内部研究听觉 P2 滤波。
