A brain can’t grow back exactly, as in if you cut a chunk out new brain would not just grow back.
What scientists do know though is that if a part of your brain is cut out, the neurons (brain cells that carry messages) that used to be there can be rearranged in the remaining tissue so that what that bit of brain used to do can still be done!
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spacenut1982 commented on :
How do they rearrange themselves?