CNN VIDEO - Rats partially overcome paralysis in stem cell study :
"Paralyzed rats partially regained the use of a previously immobile hind leg in a study in which scientists injected the rodents with stem cells from mouse embryos, according to researchers at Johns Hopkins University. Results of the study were published this week in the journal Annals of Neurology.

Before the research began, the rats were given a virus that caused a neurodegenerative disease, paralyzing them. In the study, 11 of the 15 rats made a partial, but significant, recovery from paralysis, researchers said. The rats recovered enough muscle strength to bear weight and walk on the previously paralyzed hind leg...."