By Amanda Gardner
We’ve all been there: After struggling over a problem for hours, we rest our eyes for a few minutes and suddenly the answer is lying before us, clear as day. This common phenomenon has contributed to the idea of the so-called power nap, a quick snatch of rest that stops short of deep sleep yet somehow manages to refresh and stimulate. Although there is much about the power nap that remains a mystery, researchers have begun to uncover the brain processes behind the little miracles it produces.
From Health.com