Study on increasing α wave content in Fatigue task

Abstract

Our purpose of this study is to quantify the extent of mental fatigue by EEG signals. In this paper, we aim to observe relationship between the change of alpha band power and the extent of mental fatigue during a task inducing fatigue. We perform the experiments against 5 subjects. Subjects are instructed to read 50-sentences aloud and to take a 60-seconds rest in one trial. In this experiment, subjects take a 60-seconds rest in the first time and then repeat this trial ten times. We calculate the total power between 8 and 70 [Hz] and relative band powers of alpha. As results, two features are observed. The first feature is that the relative band power of alpha in Fp1, Fp2 electrode decreases as the experiment progresses. The second feature is that the relative band power of alpha in T7, P7 electrode increases as the experiment progresses.