Alzheimer’s disease and schizophrenia are some of the most common brain disorders and have been associated with problems in cells that contain a type of protein, called parvalbumin. These parvalbumin-containing cells account for almost one-tenth of the cells in your brain, however, relatively little is known about what parvalbumin cells do. By stimulating mouse brains with lasers, researchers have started to make surprising findings about how they work.
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