MAPT and supranuclear palsy, progressive, 1: However, this scale does not accurately assess other non-motor manifestations of neurodegeneration that are symptoms of PSP, such as increasing apathy or impulsivity related to the deposition of tau protein and disorders in the frontostriatal systems and front-ponto-cerebellar circuits, which, as it seems, may also contribute to the development of disorders from the ICD scope [14,83,84].