According to past studies, stem cell therapy is a promising treatment for brain injury. During fetal development, stem cells exist as embryonic stem cells, which can differentiate into all the cell types required for the development of various tissues. What piqued the interest of many neuroscientists is that stem cells can differentiate into numerous cell types that are important for brain function, particularly neurons, glial cells, and other brain cells. Furthermore, stem cells can support the survival of other brain cells.