Résumé
Objective To explore the effect of sustained performance on EEG approximate entropy (ApEn).Methods Fifty participants were divided into two groups according to whether they had undergone sustained performance .One day af-ter the sustained-performance group finished executing their task , the resting EEG of nine electrodes ( F3, Fz, F4, C3, Cz, C4, P3, Pz and P4) was acquired in two grups separately , and the ApEn of each electrode was calculated as well . Results The ApEn of F3 and Fz showed an evident decrease as well as randomness of spontaneous brain electrode activity in frontal lobes , especially in the left one .Conclusion The drop of ApEn and the asymmetry of frontal lobes might reflect participants′state of fatigue during sustained performance .
Résumé
Objective Frontal resting EEG asymmetry was used to evaluate the gender effect of emotion regulation.Methods The resting EEG was recorded in 30 healthy volunteers (19-26 years old) by the guide 40 amplifier,and off-line analysis on EEG data were conducted by scan4.3 software.The statistical analysis were performed using SPSS 17.0.Results In normal human,frontal resting EEG alpha power was statistically significant(F=4.918,P =0.035).Asymmetry and gender interaction group (F =0.668,P =0.421),electrode point and gender interaction group (F =0.283,P =0.756),electrode point and asymmetry interaction group (F =1.418,P =0.260),electrode point,asymmetry and gender interaction group (F =1.164,P =0.327) had no statistical significance (P ＞ 0.05).The comparison of male and female asymmetry degree of each electrode point (F4/F3 group t =0.465,F8/F7 groupt=0.809,FP2/FP1 group t=1.542) had no statistical significance (P＞0.05).Conclusion Normal human brain hemispheres exist asymmetry.The asymmetry does not exists gender effect.In non-task state,frontal resting EEG alpha power asymmetry can not be recognized as the indicator of emotion regulation ability.