A Nobel Prize for Controlling the Brain with Light

Mon, 05 Oct 2026 00:00:00 +0000

How a protein from pond algae became one of the most important tools in brain science, and where you can see the data it produces.

On October 5, 2026, the Nobel Assembly at Karolinska Institutet awarded the Nobel Prize in Physiology or Medicine to Karl Deisseroth, Peter Hegemann and Georg Nagel. The citation is short: “for their discoveries concerning light-gated ion channels and optogenetics.”

Optogenetics lets scientists switch specific brain cells on or off with a flash of light. That sounds like science fiction. It is now an everyday method in thousands of laboratories, and it has changed what we can learn about memory, mood, movement and disease.

optogenetics on DANDI

A Nobel Prize for Controlling the Brain with Light