Stem cell therapy reverses stroke damage and restores movement in mice

Each year, millions of people survive strokes only to find the brain's capacity for self-repair has reached its limit, leaving movement and function permanently diminished. Now, researchers have demonstrated in mice that stem cells delivered through the arterial bloodstream can travel to damaged neural tissue, rebuild lost connections, and restore motor function — suggesting the brain's ceiling on recovery may not be fixed. The finding does not yet translate to the clinic, but it places a meaningful new possibility into the long human search for ways to heal what was once considered irreparabl