Karl Deisseroth, Peter Hegemann and Georg Nagel were recognized in medicine for pioneering work that allows scientists to control and observe nerve-cell activity with light.
Their discoveries helped establish optogenetics, a technique that uses light-sensitive proteins to switch specific neurons on or off.
The approach gives researchers unprecedented precision in mapping the brain’s complex circuits.
Optogenetics has become an essential tool for investigating conditions including Parkinson’s disease, depression, epilepsy and addiction.
The work may also support the development of more targeted treatments by revealing how individual neural pathways influence behavior and disease.
By linking light, genetics and neuroscience, Deisseroth, Hegemann and Nagel opened a new chapter in brain research. Their findings have enabled scientists to move beyond simply observing neural activity and begin testing how particular cells and circuits shape the body and mind.