The organization and the quantitative evaluation of sleep stages were studied in patients with cerebellar syndrome. 25 polygraphic night recordings were scored according to the criteria suggested by Rechtschaffen & Kales (1968) and the sleep parameters investigated were referred to those indicated by Williams et al. (1974). The results matched with a homogeneous sample of normal subjects. Significant alterations were observed for several parameters of sleep, and the possible causes discussed.
