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> > QUOTE:"[i]It is now commonly appreciated that peripheral immune stem cells (and even fetal cells from pregnant moms circulating in maternal blood) can migrate across the adult BBB [blood brain barrier] and fuse with local neurons to create all kinds of new hybrid entities. [/i]
> > 
> > dhw: The article is far too technical for me to follow in its entirety, but this leapt off the page. All kinds of new hybrid entities = innovation, and once again we have stem cells in the thick of it. So are stem cells the key to how evolution works?
> > 
> > DAVID: [i]this shows how difficult it is to understand how the brain does its amazing work as the result of neurogenic and chemical coordinated activities. Not by chance.[/i]
> > 
> > dhw: What this shows is that the brain does its amazing work as the result of materials interacting. Some would suggest that this offers support for materialism as opposed to dualism.
> 
> All it means to me is the enormous number of automatic underlying controls for brain plasticity to act appropriately. If the brain is like a receiver, it can change from AM to FM, nothing more