07/08/2025
Groundbreaking new research has officially put an end to one of neuroscience’s biggest debates. Scientists at Sweden’s Karolinska Institutet have confirmed that the adult human brain can grow new neurons, even well into old age.
Using cutting-edge tools like single-nucleus RNA sequencing and high-resolution imaging, researchers examined brain tissue from individuals aged 0 to 78. What they found was clear and powerful: neural progenitor cells, the building blocks of new neurons—were actively dividing in the hippocampus, the brain’s memory and learning centre.
This process, called neurogenesis, was particularly evident in a subregion known as the dentate gyrus. Though the number of new cells varied between individuals, the fact that this regeneration continues throughout life is a game-changer.
This discovery not only changes how we understand brain plasticity but also paves the way for new treatments targeting memory loss, cognitive decline, Alzheimer’s disease, and depression. By stimulating this natural ability to produce new brain cells, future therapies could enhance mental health and cognitive resilience in aging populations.
The research also revealed biological similarities with how neurogenesis works in other species, offering valuable insights for future studies. The adult brain is far more alive and capable of healing than once thought.