Adult Neurogenesis in Humans and Significance of New Finding

Context: A 2025 study in Science by Karolinska Institutet, Stockholm, has provided fresh evidence of adult neurogenesis.

What is Neurogenesis?

• Neurogenesis is the process by which new neurons (nerve cells) are formed in the brain.
• It mainly occurs in the hippocampus (dentate gyrus), the region responsible for memory, learning, and emotional regulation.

What is the New Finding?

• The new study has provided strong evidence that neurogenesis continues in the adult human brain, specifically in the hippocampus.
• This overturns the long-held belief that new neurons stop forming after childhood.

Significance

• Establishes adult neurogenesis as a conserved feature in mammals.
• Explains how the adult brain maintains flexibility in learning and memory.
• Offers hope for regenerative therapies to treat neurodegenerative diseases such as Alzheimer’s, Parkinson’s, and dementia.

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