MAPT and supranuclear palsy, progressive, 1: For our primary analyses on the subcortex (i.e., where tau-PET was significantly elevated in PSP-RS and CBS compared to controls), we found the expected associations between higher functional connectivity and higher 18F-PI-2620 PET covariance in PSP-RS (β = 0.616, p < 0.001, Fig. 4A) and CBS (β = 0.561, p < 0.001, Fig. 4B).