Among older adults in a Tasmanian community cohort, 7.1% screened positive for probable REM sleep behavior disorder (pRBD). Females with pRBD reported more nightmares related to waking-life experiences than males. Compared to controls, the pRBD group recalled dreams more often, experienced more lucid dreams, and had more nightmares during childhood. The findings suggest that screening questionnaires focusing on aggressive dream features may miss females with RBD, and including questions about waking-life-related nightmares could improve detection.
Consumer-grade EEG headbands are popular for meditation, but existing indicators cannot distinguish the complex states that occur during meditation. Researchers designed tasks simulating different attention stages during meditation and used Multifractal Detrended Fluctuation Analysis (MFDFA) to analyze recorded EEG. The more immersive the meditation, the faster people entered a second stage shown in MFDFA, and the lower the multifractal strength there, indicating more consistent neuronal activity and a deep meditation state of peace and acceptance beyond external interference.