Why do some people wake up feeling well rested, while others feel perpetually groggy? The answer may lie in arousal systems deep in the center of the brain. https://www.quantamagazine.org/how-the-brain-moves-from-waking-life-to-sleep-and-back-again-20251017/
How the Brain Moves From Waking Life to Sleep (and Back Again) | Quanta MagazineNeuroscientists probing the boundary between sleep and awareness are finding many types of liminal states, which help explain the sleep disorders that can result when sleep transitions go wrong.www.quantamagazine.org