Debunked: Do Neurons Die as We Get Older?

  • Published31 Jul 2019
  • Source BrainFacts/SfN

In a healthy, aging brain, some cognitive changes are normal — but total neuronal cell death is not. Neuroscientist John Morrison debunks the myth that neurons always die as people age.



John Morrison: I’m John Morrison. I’m at U.C. Davis, where I’m professor of neurology and director of the California National Primate Research Center.

Screen Text: Do neurons die as we age?

John Morrison: That’s generally not true. Neurons die if you have Alzheimer’s disease or Parkinson’s disease or any of the neurodegenerative disorders. But if you age without neurodegeneration, you don’t lose a significant number of neurons. So, what leads to cognitive decline, in some people, is changes at the synapse, in neurons that are still alive. Which is a very positive thing because, or a very hopeful thing, because if the neuron’s still alive you might be able to intervene in a way to make the synapses healthy again. And if the neurons die, you’re in a very difficult situation therapeutically.

Ask An Expert

Ask a neuroscientist your questions about the brain.

Submit a Question


Do you believe any of these common neuromyths? Test your knowledge.

Read More

Research & Discoveries

See how discoveries in the lab have improved human health.

Read More