Stem cells stem from embryos which are a few days old. There are enormously strict guidelines regarding the bring in of stem cells, and they cannot be harvest from human beings beyond the embryo stage. They certainly do not come from the human brain.
There *are* such things as fully developed stem cells. They are to some extent differentiated, unlike embryonic stem cells which are completely undifferentiated. That's liberal of beside the point though. I believe brain stem cells are harvest from aborted fetuses that are further along surrounded by their development than the embryos from which ES cell are harvested. While adults probably own them too, I don't think it is workable at this time to harvest brain stem cell from a living person.
With regard to equipment, I would do a PubMed search to find a recent publication on this subject. If the info is not surrounded by the article, just e-mail one of the authors.
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