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Since the 1920s, researchers have recorded rhythmic patterns or electrical impulses in the brain. Now, rhythm is known to have effects on perception, attention, working memory, learning, and language. Gazzaley, a neuroscientist, wants to determine if these rhythms vary between healthy individuals. He is also interested in exploring what roles these rhythms play in various disorders. In one experiment, Gazzaley worked with the drummer, Mickey Hart, by strapping him to an EEG while playing the drums. Hart's brain was shown on screen, live.

With previous research suggesting that the fostering of long term memories happens during sleep (when the brain is in an oscillating rhythm), current research suggests that listening to audio coinciding with that rhythm can increase memory skill. As an experiment, researchers worked with 11 healthy students who were asked to memorize 120 word pairs before going to bed. As a result, on the night that they listened to the rhythm of their brain, they remembered the most words. This study also revealed that synced audio was linked to a longer deep sleep instead of more deep sleep cycles.