A 78 year-old woman developed the abrupt onset of a right third nerve palsy and a left hemiparesis. Sensation was intact. Midbrain Infarction: ((Left) Flair axial MRI; (Right) Diffusion-weighted MRI.

Your brainstem anatomy contains unique nerve fibers that interact with and support different parts of your body. Each part of the brainstem contains unique cranial nerves. The midbrain.