In the present study, we explored the group difference of MCI patients
and normal controls on EEG alpha and beta bands brain networks
by measuring phase synchronization with graph theoretical tools in different
cognitive process. Analysis revealed that the characteristic
network inMCI patientswasmore close to the theoretical values of random
network and small-world network characteristics was lost in MCI
patients compared with healthy controls. Furthermore, we found similar
time-evolution characteristic of cortical networks during the color
selective attention task for two groups.