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News
Three scientists just won the 2026 Nobel Prize in Physiology or Medicine for inventing optogenetics, a technique that uses light to switch individual brain cells on or off. Karl Deisseroth, Peter Hegemann, and Georg Nagel share the $1.2 million prize. Their work is already opening doors to new treatments for Alzheimer's, epilepsy, Parkinson's, and even blindness.
Three scientists just won the Nobel Prize in Medicine for literally turning brain cells on and off with light.
Karl Deisseroth (Stanford), Peter Hegemann, and Georg Nagel were awarded the 2026 Nobel Prize in Physiology or Medicine for developing optogenetics — a revolutionary technique that uses light to control the activity of individual nerve cells in a living brain. The discovery traces back to the early 1990s, when Hegemann studied how a single-celled alga responds to light, leading to the identification of channelrhodopsin-2, a light-sensitive protein. Deisseroth later demonstrated the technique in rat neurons, and by 2006, "optogenetics" was officially coined.
Today, labs worldwide are using the method to decode the brain's most complex disorders — and early clinical applications are already emerging, including partial vision restoration in patients with retinitis pigmentosa.
By the Numbers:
Why it matters: Optogenetics gives scientists an unprecedented ability to pinpoint exactly which brain cells drive disease — a critical step toward precision therapies for conditions that currently have very limited treatment options.
