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What is Karl Deisseroth known for?

American psychiatrist and bioengineer Karl Deisseroth is known for developing methods that revolutionized the study of the brain and led to major advances in neuroscience and biomedical engineering. In particular, Deisseroth’s work opened the way to optogenetics, which combines tools from optics and genetic engineering to understand cell function and animal behavior. For his discoveries, he was awarded a share of the 2026 Nobel Prize for Physiology or Medicine.