Animal research on genetically modified mice suggests that a specialised form of flashing light therapy might help slow the progression of Alzheimer’s Disease. It appears that shining a strobe light, flashing at a rate of 40Hz, into rodents’ eyes may (for some unknown reason) encourage protective cells (the resident immune cells in the brain called microglia) to absorb the harmful beta amyloid proteins which accumulate in Alzheimer’s Disease.
Roberts, M. (2016). ‘Flashing light therapy’ for Alzheimer’s. London: BBC Health News, December 7th 2016.
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Iaccarino, HF. Singer, AC. [and] Martorell, AJ. [et al] (2016). Gamma frequency entrainment attenuates amyloid load and modifies microglia. Nature. December 7th 2016; 540(7632): 230-235.