progressive supranuclear palsy

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progressive supranuclear palsy (Steele-Richardson-Olszewski syndrome) n. a progressive neurological disorder resulting from degeneration of the motor neurones, basal ganglia, and brainstem. Starting in late middle age, it is characterized by a staring facial expression due to impaired ability to move the eyes up and down, progressing to difficulties in swallowing, speech, balance, and movement and general spasticity.

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