<prompt> Hummingbird sign on MRI is seen in -Multisystem atrophyLewy body dementiaProgressive supranuclear palsyAlzeihmers disease  <response>: Ans. is c i.e., Progressive supranuclear palsy o Hummingbird sign and Mickey Mouse sign are seen on MRI in progressive supranuclear palsy,o In progressive supranuclear palsy PSP, severe mesencephalic atrophy occurs, giving the appearance of a hummingbird on mid-sagittal images. 