A recent German study reveals that brief bouts of sleep, power naps, improve memory and mental performance.

Dr. Olaf Lahl at the University of Dusseldorf, Germany, has shown that simply falling asleep does more than refresh the brain - it can improve recall and mental efficiency.

In fact, a six-minute nap can have the same effect as nighttime sleep on memory.

Dr. Lahl’s team asked students to memorize a list of vocabulary and tested their ability to recall the list after an hour of playing solitaire.

via Earth Times