PALO ALTO, Calif.--(BUSINESS WIRE)--Oct. 20, 2005--StemCells, Inc. (NASDAQ: STEM) today announced that it has received clearance from the U.S. Food and Drug Administration (FDA) to begin a Phase I safety and preliminary efficacy trial of the Company's proprietary human neural stem cell product HuCNS-SC(TM) to treat Batten disease. Batten disease is a rare, fatal genetic disorder that affects the central nervous system of children. This is the first-ever FDA-approved clinical trial to use a purified composition of human neural stem cells as a potential therapeutic agent in humans.