A fonte da notícia é chinesa mas já a vi noutros lados (e o pequeno estudo é de Stanford):
http://news.xinhuanet.com/english/2016-06/06/c_135414635.htm
Citando: "In an "unprecedented" clinical trial, U.S. researchers have successfully reversed the long-term debilitating effects in some of the stroke patients by injecting stem cells directly into their brains.
"This wasn't just, 'They couldn't move their thumb, and now they can,'" lead author Gary Steinberg, professor and chair of neurosurgery at the Stanford University School of Medicine, said in a statement.
"Patients who were in wheelchairs are walking now," said Steinberg, who led the 18-patient trial and conducted 12 of the procedures himself."
(...)
"The stem cells, called SB623, are derived from the bone marrow of adult donors and modified to beneficially alter the cells' ability to restore neurologic function."