| Sumario: | The article focuses on the phenomenon of "local sleep," where small clusters of neurons briefly enter a sleep-like state while the rest of the brain remains awake, and its potential cognitive benefits during wakefulness. Research led by neuroscientists Giulio Tononi and Chiara Cirelli at the University of Wisconsin-Madison suggests that local sleep may perform some of the brain's restorative functions typically associated with global sleep, such as synaptic homeostasis, even in sleep-deprived states. Studies in mice show that inducing local sleep can improve memory recall similarly to actual naps, while human research indicates that wakeful rest—periods of quiet relaxation without sensory input—may also enhance memory consolidation. Although local sleep is not a substitute for full sleep, it appears to be an adaptive mechanism that helps the brain manage cognitive demands and maintain function when global sleep is insufficient.
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