Progressive supranuclear palsy.

Progressive supranuclear palsy (PSP) is a neurodegenerative tauopathy which can manifest clinically in a variety of syndromes. In this review, the classic and most common variant syndrome -PSP-Richardson's syndrome (PSP-RS) -is the focus, with the core clinical features, varying cognitive/motor/neuropsychiatric/sleep manifestations, neuropsychological findings, and typical neuroimaging findings all reviewed. Management strategies are also discussed. Of particular interest are the recently commenced clinical trials involving agents which affect key steps in the presumed pathogenesis of the tauopathies. The distinctive and recognizable characteristics of PSP-RS and advent of clinical trials involving potential disease modifying agents underscore the importance of identifying patients with this disorder and encouraging their involvement in trials.