Fig. 16From: Multimodality imaging of neurodegenerative disorders with a focus on multiparametric magnetic resonance and molecular imagingSagittal T1-weighted image in the midline coned to the brainstem demonstrates midbrain atrophy creating the so-called hummingbird sign of PSP (a). Axial T1-weighted image at the level of the midbrain demonstrates decrease in the AP dimension of the midbrain and widening of the interpeduncular cistern; the so-called morning glory sign (b)Back to article page