Restricted truncal sagittal movements of rapid eye movement behaviour disorder
Danielle Wasserman, Silvia Gullone, Iain Duncan, Mattia Veronese, Valentina Gnoni, Seán Higgins, Adam Birdseye, Emine Cigdem Gelegen, Peter J. Goadsby, Keyoumars Ashkan, К. Ray Chaudhuri, Giulio Tononi, Panagis Drakatos, Ivana Rosenzweig
Abstract
Unlike sleep-walkers, patients with rapid-eye-movement-behaviour disorder (RBD) rarely leave the bed during the re-enactment of their dreams. RBD movements may be independent of spatial co-ordinates of the 'outside-world', and instead rely on (allocentric) brain-generated virtual space-maps, as evident by patients' limited truncal/axial movements. To confirm this, a semiology analysis of video-polysomnography records of 38 RBD patients was undertaken and paradoxically restricted truncal/thoraco-lumbar movements during complex dream re-enactments demonstrated.