MAOB and supranuclear palsy, progressive, 1: A recent post mortem study in parkinsonian conditions showed elevated MAO-B levels in the putamen and midbrain of MSA patients, elevated MAO-B levels in the caudate nucleus, putamen, and midbrain of PSP patients but no elevation of MAO-B in the basal ganglia of PD patients (Tong et al., 2017).