Researchers working on the University of Wisconsin-Madison campus have shown that neurons derived from human embryonic stem cells and implanted into the brains of mice can connect with the brain?s circuitry to both transmit and receive signals. The findings, which were reported Monday in the Proceedings of the National Academy of Sciences by a team of scientists who work at the university?s Waisman Center, could help lead to new therapies for treating everything from strokes and traumatic brain injuries to Parkinson?s and Huntington?s disease.