HTR2A and supranuclear palsy, progressive, 1: Post hoc spatial correlation analysis of the rT1/T2 maps of the PSP patients with multiple neurotransmitter maps revealed significant spatial correlations with the CB1 (ρ = 0.22; pFDR = 0.003)-, 5HT2a (ρ = 0.19; pFDR = 0.03)-, and mGluR5 (ρ = 0.27; pFDR = 0.030)-receptor maps.