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  Indian J Med Microbiol
 

Figure 3: Humming bird sign: Mid-sagittal T1-weighted sequence MRI brain showing atrophy of the midbrain tegmentum, with a relatively preserved pons, decreased midbrain-to-pons ratio with a superior aspect concavity, resembling the head and body, respectively, of a humming bird

Figure 3: Humming bird sign: Mid-sagittal T1-weighted sequence MRI brain showing atrophy of the midbrain tegmentum, with a relatively preserved pons, decreased midbrain-to-pons ratio with a superior aspect concavity, resembling the head and body, respectively, of a humming bird