The Difference of Brain Functional Connectivity between Eyes-Closed and Eyes-Open Using Graph Theoretical Analysis
Figure 4
The difference connected graphs in the theta band (4–7 Hz) between EC and EO states in five costs. The first step is to construct the connected graphs of EC and EO states at each cost, which was composed of the edges which were significant among all subjects by the chi-square test (). The next step is to construct the difference connected graphs of EC and EO states at each cost. If only EC state had an edge in connected graph, the two nodes would be linked by a blue line. Otherwise, the two nodes were linked by a red line. The top left corner was the standard layout of the brain cap, with the positions of the electrodes indicated by small solid circles and numbered according to the 10–20 electrode placement system. The figure showed that the connections significantly reduced in the frontal area from EC to EO states in the theta band.
