A 68-year-old woman had a gait disturbance, diystonia, neck retroflexion, and disturbed vertical ocular movements which led us to the clinical diagnosis of progressive supranuclear palsy.
Neurootologically, upward and downward gaze were disturbed, and dolls eye phenomenon was positive. In addition, convergence was disturbed. In vertical eye movements, both smooth pursuit and saccade were disturbed, but in horizontal eye movements, only smooth pursuit was disturbed.
Optokinetic nystagmus featured poor responces both vertically and horizontally. A visual suppression test revealed marked firing bilaterally. The findings of various examinations suggested that the pathological focus in this case was in the supranuclear area of the midbrain.
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