Researchers find cause of cognitive decline
Scientists from the German Cancer Research Center found that if Dickkopf-1 (a signaling molecule) is turned off, significantly more neurons are generated in the brains of older mice. With the gene turned off, even mice in advanced adult age reached an equal mental performance – in tests for memory and spatial orientation – as young mice.
http://www.medicalnewstoday.com/releases/256119.php