Every year, millions of lives are suddenly, swiftly transformed by a stroke, which occurs when a blood vessel traveling ...

The human brain can do many amazing things, but self-repair is not one of its repertoire of abilities. Once neurons die—from trauma, stroke, or disease—they rarely grow back. Scientists have been ...

A team of scientists—including Agnieszka Ciesielska (left), Barbara Klein (center), and Jeanne Paz (right)—showed that modified stem cells can improve brain activity, even when administered more than ...