Scientists believe that sometimes the brain throws up roadblocks to prevent the cortex from being disturbed during crucial periods of sleep when memories are consolidated. These roadblocks are sleep spindles, which also have a characteristic appearance on an EEG.
Researchers from Harvard Medical School's Division of Sleep Medicine and colleagues theorized that people whose brains produced a higher rate of sleep spindles would be rewarded with a sounder sleep.
To test their hypothesis, they convinced 12 volunteers to spend three nights in a sleep lab at Boston's Massachusetts General Hospital....read the whole piece
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