University of Zurich (UZH) Sep 16 2025 Stem cell transplantation can reverse stroke damage, researchers at the University of Zurich report. Its beneficial effects include regeneration of neurons and restoration of motor functions, marking a milestone in the treatment of brain disorders. One in four adults suffer a stroke in their lifetime, leaving around half of them with residual damage such as paralysis or speech impairment because internal bleeding or a lack of oxygen supply kill brain cells