MAPT and supranuclear palsy, progressive, 1: 2018; Moller et al. 2017; Mueller et al. 2018; Sjöström et al. 2020). Our segmentation of mesencephalic structures using a multimodal approach with automated volumetry could indicate that some mesencephalic regions may show predominant atrophy. Previous studies suggested alterations in the dentato‐rubral tract using DTI, and iron and tau deposits are observed in the red nucleus in PSP patients (Dickson 2012; Koga, Zhou, and Dickson 2021; Kouri et al. 2021; Li et al. 2021; Mazzucchi et al. 2019; Potrusil et al. 2020; Seki et al. 2018; Sjöström et al. 2017; Surova et al. 2015).