MAPT and red-green color blindness: PSP shows aggregates of 4-repeat tau (4R) in neurons (neurofibrillary tangles), astrocytes (tufted astrocytres) and oligodendrocytes (coiled bodies) prevalently located in basal ganglia and brainstem, while CBD is characterized by the presence of 4R tau in oligodendrocytes (coiled bodies), astrocytes (astrocytic plaques), and neurons located in neocortex and basal ganglia [3].