Over and over, promising medications tested for Alzheimer’s treatment fail in human trials. Now, scientists have tried an innovative new approach: “gamma oscillation entrainment.” In this approach, a gentle light and a buzzing sound, each pulsing 40 times per second, were delivered to the patients (so far, only mice). Surprisingly, that frequency energized special brain cells, which helped to clear out the amyloid plaques associated with Alzheimer’s.

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