Stem cells come from an early embryo and these are divided into three types which are Embryonic stem cells, tissue stem cells and Induced pluripotent stem cells, or ‘reprogrammed’ stem cells. Currently, stem cells are being used in the laboratory for clinical trials to provide new therapies and other possible ways for treatments for certain diseases. Hope this answer helps.
Here’s the answer to your question would be:
They replace old neurons with new ones.
Here’s a article from the internet:
“Today, most treatments for damage to the brain or spinal cord aim to relieve symptoms and limit further damage. But recent research into the regeneration mechanisms of the central nervous system, including the discovery of stem cells in the adult brain that can give rise to new neurons and neural support cells, has raised hopes that researchers can find ways to actually repair central nervous system damage. Research on stem cells in nervous system disorders is one of the few areas in which there is evidence that cell-replacement therapy can restore lost function.”
If we were hunting for trilobites in Canada, we look for those types of rocks where once water present on it because trilobites are the organisms which lived in the marine ecosystem so if they are present in marine so we have to look those rocks which were underwater millions of years ago. Trilobites are the extinct marine arthropods that were present around 521 million years ago.
Parents that are loving and caring will most likely raise one that is similar. On the other hand, a parent that is abusive and mad constantly, will raise one that is mad and moody as well.