Case ReportPublished 4 August 2026Case Report: non-monotonic longitudinal RSWA with tonic–phasic dissociation across serial attended video-polysomnography in isolated REM sleep behaviour disorderValentina Gnoni · Nazanin Biabani · Istvan Papp · Camilla Speicher · Adam Birdseye · Sakina Dastagir · Martina Mulas · Monica Puligheddu · Clive Ballard · Luigi Ferini-Strambi · David O'Regan · Ivana RosenzweigFrontiers in Sleepdoi 10.3389/frsle.2026.1816079