If there were a device that could implant identical local young neurons into the brain instead of the old ones, one could...?

Answer from: Igor Savin:
Energetic by profession. Linguist, psychologist, translator - by interest....

A complete match of the new neuron with the old one is not enough, because a significant role in memory and learning is played by connections of neurons with other neurons, but not by them (although there is a theory that memory is also connected with genes).
In my opinion, the best solution would not be to completely replace the old neurons, but to replace the damaged parts of the neurons and lengthen their telomeres with nanobots. But there is still a risk that these changes will affect a person's consciousness t.к. this area is little explored.

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