A study of zebra finches found that adult neurogenesis—the formation of new brain cells—causes new neurons to tunnel destructively through existing neural pathways, potentially disrupting stored memories and established connections. The research suggests that mammals may have evolved to restrict adult neurogenesis as a protective mechanism to preserve important long-term memories, though scientists caution that findings in birds may not directly apply to mammalian brains.
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A study of zebra finches found that adult neurogenesis—the formation of new brain cells—causes new neurons to tunnel destructively through existing neural pathways, potentially disrupting stored memories and established connections. The research suggests that mammals may have evolved to restrict adult neurogenesis as a protective mechanism to preserve important long-term memories, though scientists caution that findings in birds may not directly apply to mammalian brains.