The Brain’s Secret to sleeping like a log
Sleep researchers from Harvard Medical School performed a slightly torturous experiment on 12 healthy volunteers. On their first night at the sleep lab, the subjects’ brain waves were monitored via electroencephalography (EEG), but they were otherwise left in peace. That night, the researchers measured one particular sleep phenomenon: the brief bursts of high-frequency waves known as “sleep spindles.” On the following two nights, the researchers did their best to replicate a really irritating night’s sleep.
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