Sleep Boosts Memory!

You’ve probably heard that a good night’s sleep is essential to your overall health, but a recent study suggests one benefit you may not be aware of: sleep boosts memory. The study, which was conducted at Northwestern University, progressed as follows:

• Research participants were first shown 50 images arranged in various places on a computer screen.
• Each image was coupled with a related sound. For instance, an image of a cat appeared on the bottom left of the screen and was shown with a “meow” sound.
• Participants were asked to try to memorize the location of each image and then take a nap.
• While they slept, they were presented with 25 of the sounds they had heard during the earlier spatial learning.
• Upon waking, memory tests showed the sounds had penetrated the sleeping brain. The participants each did slightly better, on average, at recalling the locations of images for which they had received sound cues during sleep.

This is exciting new evidence, adding to a growing body of research which shows that memory is dependent on sleep. For more information on the Northwestern study (which was published in the Journal Science on November 20) click on www.northwestern.edu/newscenter/stories/2009/11/paller.html

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