2026 Nobel Prize in Medicine awarded for brain research tool called optogenetics

The 2026 Nobel Prize in Physiology or Medicine has been awarded jointly to Karl Deisseroth, Peter Hegemann, and Georg Nagel, STAT News reported October 5. The prize committee cited the three researchers “for their discoveries concerning light-gated ion channels and optogenetics.”

Optogenetics refers to a technique that allows scientists to control the activity of individual neurons using light, by introducing light-sensitive proteins called opsins into brain cells. Hegemann and Nagel’s earlier work identified and characterized these light-gated ion channels, laying the groundwork for their later application to neuroscience. Deisseroth is credited with adapting and advancing the tool for use in living brain tissue, enabling researchers to switch specific neurons on or off with pulses of light and observe the resulting effects on behavior and brain function.

According to the report, the technique has become a standard method in neuroscience laboratories worldwide, used to map neural circuits and study how discrete populations of neurons contribute to processes such as movement, memory, and mood.

The Nobel Prize in Physiology or Medicine is one of the original five prize categories established in Alfred Nobel’s will and is awarded annually by the Nobel Assembly at the Karolinska Institute in Stockholm. STAT News noted the award recognizes a tool whose influence has extended broadly across brain research since its development.