True or False: adult CNS nerves can not grow back?

I keep hearing both; that they can and they cannot grow back. Which is true?True or False: adult CNS nerves can not grow back?
The general concensus is that CNS nerve cells do not regenerate.





However, there are medical oddities. For example, my mother had part of her thyroid removed twice because it regenerated which only happens in a small proportion of the population.





In the Peripheral Nervous system, there is a well-recognized ability for nerves to regenerate. The CNS in animals will not without artificial assistance, such as stem cells.True or False: adult CNS nerves can not grow back?
The cells, once the cell body is dead, cannot grow back.





Axons can grow back, but only over the course of months or years.

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