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Inner Workings: A pulse of hope in the fight against Alzheimer’s

This is an excellent review of the latest developments in the 40Hz brain stimulation research. Tsai and her team have shown that inputs of gamma waves boost the activity of immune cells in the brain called microglia that clear amyloid plaques and tau tangles. Oscillating light and sound waves also increased blood flow, improved the survival and health of the animals’ neurons, and bolstered their connectivity across brain regions. “All of these effects converge to reduce cognitive impairment and pathology,” Tsai says.