Medicine: Brain Healing

Implanting fetal cells in rats

Brain damage is forever, or so doctors once thought, but that longstanding medical axiom is now being proved wrong. In laboratories across the U.S. and Europe, researchers are finding that by creating the right chemical environment, and in some cases implanting new cells in the brain, damaged nervous systems can be coaxed to regenerate. Even more encouraging is the discovery, so far shown only in animals, that cellular regrowth can restore lost mental functions, and, in addition, improve memory and learning.

The latest achievement in this promising field is...

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