Long-term Monitoring of Movements in Bed and Their Relation to Subjective Sleep Quality

Standard sleep polygraphy with EEG, EOG, and EMG recording (1) or the modern polysomnogram including even more physiological parameters has been infrequently applied in long-term follow up studies with an extended number of subjects. These methods usually presuppose a laboratory setting which can be considered as too laborious and expensive for some applications. Additionally, the sleep laboratory can have known effects (first-night effect, FNE) on sleep architecture (2), in some cases even paradoxial ones (3). There is a need for objective methods which are uncomplicated and cost-effective, and which can be applied in natural sleeping Long-term Monitoring of Movements in Bed and Their Relation to Subjective Sleep Quality