Skip to the bottom of the neurosphere link to get to the scientific studies. This one is especially good: http://jov.arvojournals.org/article.aspx?articleid=2

Skip to the bottom of the neurosphere link to get to the scientific studies. This one is especially good: http://jov.arvojournals.org/article.aspx?articleid=2191517 http://jov.arvojournals.org/article.aspx?articleid=2191517