Fig. 2
From: How to spot ocular abnormalities in progressive supranuclear palsy? A practical review
Sagittal section of human brainstem showing the locations of the degeneration of brainstem nuclei responsible for the presence of ocular abnormalities in PSP. Black circles represent the degeneration of some specific brainstem structures resulting in ocular abnormalities. Abbreviations: riMLF: rostral interstitial nucleus of the medial longitudinal fasciculus, RN: red nucleus, INC: interstitial nucleus of Cajal, PPRF: paramedian pontine reticular formation, MLF: medial longitudinal fasciculus, SC: superior colliculus, IC: inferior colliculus, 3: nucleus of the oculomotor nerve, 4: nucleus of the trochlear nerve, 6: nucleus of the abducens nerve, 7: nucleus of the facial nerve