The brain has extremely limited capabilities to replace lost cells, but new strategies are emerging to improve the brain’s ability to replace neurons and facilitate incorporation of implanted cells into brain circuitry. One strategy would be to encourage existing neurons or neural stem cells in the brain to divide and/or grow new connections. Another approach would be to transplant stem cells and stimulate those cells to incorporate into existing brain architecture. Most experts agree that stem cell-based transplant therapies for neuroregeneration are...
