Researchers at the Massachusetts Institute of Technology (MIT; Cambridge, MA) have shown that an optogenetic approach involving LED’s that flicker at a specific frequency can substantially reduce the beta amyloid plaques seen in Alzheimer’s disease. The method was shown in the visual cortex of mice. This treatment appears to work by inducing brain waves known as gamma oscillations, which the researchers discovered help the brain suppress beta amyloid production and invigorate cells responsible for destroying the plaques.