DREAMER - IsolateD REM Sleep Without Atonia as a Risk Factor for REM Sleep Behavior disordER

Polysomnography for the assessment of the presence of REM sleep without atonia (RSWA). All Units will recruit subjects to be included in the cohort and this will ensure the inclusion of a sufficiently large sample of subjects without and, especially, with RSWA. From a previous study \[Ferri et al. Sleep 2018:zsy187\] that we carried out on a similar group of subjects, we know that we can expect to find RSWA in approximately 14% of individuals.