Human Need for 8-Hour Sleep: Neurobiology, Circadian Regulation, and Health Outcomes in Adults
“Eight hours” is a commonly used benchmark for adult sleep duration, but it is best understood as an approximate requirement shaped by circadian biology, sleep homeostasis, and neurophysiological vulnerability to sleep loss. Sleep is not a passive state; it is an actively regulated process that coordinates synaptic homeostasis, metabolic function, immune signaling, endocrine rhythms, and… Read More »