Karl Deisseroth

Professor of psychiatry and bioengineering, Stanford University; investigator, Howard Hughes Medical Institute

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Nobel Prize in medicine honors optogenetics, a light switch for brain cells

Shares the 2026 Nobel Prize in Physiology or Medicine

The 2026 Nobel Prize in Physiology or Medicine went to three scientists who built a light switch for brain cells. Karl Deisseroth, Peter Hegemann, and Georg Nagel share the 12 million Swedish kronor prize for optogenetics, a method that lets researchers turn individual neurons on and off with pulses of light.

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