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For decades, it has been dogma that the human brain can not repair itself. Once neurones die, they stay dead and are not replaced. The human brain was considered just too complex to self-repair like the other body organs. However, a paper recently published in Nature contests this.
The paper from Jeffrey Macklis of Harvard Medical School and co-workers Sanjay Magavi and Blair Leavitt, contradicts over a century of neuroscience belief that the mammalian brain and particularly the cerebral cortex is incapable of healing. "Somewhere during evolution it was believed," Macklis says, "our brain, unlike the brains of other lower vertebrates, decided it would no longer do self-repair. The assumption has been that because we as mammals build a very complex brain, we don't want to mess around with it. We know now that this view isn't correct."