highly significantp < 0.01
Lack of high alpha phase synchronization between bilateral parietal areas in PD + sFOG Bilateral parietal high alpha phase synchrony between Cp1 and Cp2 is present in all groups except PD + sFOG, where a highly significant ( p < 0.01) phase synchrony is seen between Cp1 and Cp2 in low alpha, alpha, and low beta, as observable in the top row in Figure 2 .