In brief
US psychiatrist and neurologist Karl Deisseroth, along with German colleagues Peter Hegemann and Georg Nagel, received the Nobel Prize in Physiology or Medicine for pioneering optogenetics—a technique that uses light to control neural activity. The breakthrough enables precise mapping of brain circuits tied to specific memories, feelings, and behaviors, offering fresh avenues for treating neurological and psychiatric conditions. Researchers are already applying the method to restore sight in patients with visual impairments. The prize underscores the new era in neuroscience ushered by optogenetics. As mental health challenges rise amid climate change pressures, such advances could support resilience and well‑being among affected communities.
The 2026 Nobel Prize in Physiology or Medicine was awarded to US psychiatrist and neurologist Karl Deisseroth and his German colleagues Peter Hegemann and Georg Nagel for pioneering the field of optogenetics.
Optogenetics uses precise light pulses to activate or silence specific neurons, allowing scientists to map the neural circuits that underlie memories, feelings, and behaviors.
The prize committee praised the trio for laying the foundation of a new era in neuroscience and for revealing the circuits behind disorders such as depression, epilepsy, and Parkinson’s disease.
In clinical medicine, researchers are applying optogenetics to restore sight in patients with visual impairment, a promising avenue for improving independence and quality of life.
Beyond hospitals, these breakthroughs can benefit climate‑impacted communities, where stress and mental health challenges are mounting. Therapies that target specific neural pathways could help build psychological resilience as populations grapple with changing climates and the hazards that accompany them.
