I posted about this over at our sister blog – The Science of the Evolving Mind – I hadn’t considered the question until I came across the research suggesting an answer…

Could new cell formation in the hippocampus lead to the loss of existing memories?

Scientists from Korea have demonstrated that mice with a contextual fear memory retain that fear memory whether neurogenesis has been halted or not.

So, new brain cell growth doesn’t necessarily displace existing memories.

Good news for those of us intent on stimulating new neural growth!