Study on Brain Fatigue Based on EEG Signals

In order to detect human brain fatigue,we recorded EEG signals of 50 subjects by means of MP 150 recorder system.The subjects were divided into two groups.One group was in mind fatigue state,the other was controled group who had full of energy.We analysed the EEG signals by wavelet packet decomposition method.After analysis and reconstructure operation,we got the alpha,beta,gamma,delta, rhythm and the power spectrum distribution of these componengts.Compared with the control,the human in fatigue state have enhanced alpha wave and reduced beta wave.So the conclusion is that the redistribution of alpha and beta wave could regard as a potential diagnostic critera of brain fatigue.