Berlin: According to a new study, playing sounds synchronised with the rhythm of the slow brain periodic variations which boosts human’s memory and increases the quality of sleeps.
Researchers say that the sounds which are out of sync cannot improve memory.
The rhythmic sounds strengthen the brain’s slow oscillations by increasing amplitude and by making slow-wave sleep last longer.
It has long been known that brain oscillations are slow during sleep so-called slow-wave sleep are critical for boosting memories.
However, it has only just been established that rhythmic sounds can be used to enhance these oscillations.
Co-author Dr Jan Born from University of Tubingen in Germany and his colleagues had carried tests on 11 people during which they exposed the participants to sound stimulations.
It was exposed that the volunteers who heard stimulating sounds in sync have better ability to remember word associations which they had learned in evening.
Stimulation out of phase with the brain’s slow oscillation rhythm was ineffective.
The researchers expect that this technique might also be able to improve sleep.
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