[Nebullis]

These findings point to some limitations in using stem cells to replace neural deficits. New cells will not "take" in an area which will normally not accept neurons via neurogenesis.

Just BTW, your network based idea of memory is belied by the fact that specific clusters of neurons with very specific gene expression and proteins are responsible for selected cognitive functions.

[RightWhale]

New cells will not "take" in an area which will normally not accept neurons via neurogenesis.

Could new groups be added --as in adding a new lobe or replacing a lobe in its entirety-- and would the new lobe communicate with the existing structure? Could I have a lobe added to replace my missing aesthetic lobe?

[RightWhale]

specific clusters of neurons with very specific gene expression and proteins are responsible for selected cognitive functions

Indeed they are. Some symptoms of schizophrenia might be due to cross-wiring in the lower brain, whether acute and temporary or slowly developing and permanent. Some people see colors as part of their aesthetic reaction to objects. Read that in an old Smithsonian.