Americans suffer three-quarters of a million strokes every year. For those who survive, recovery can be long and arduous. It doesn't help that rehabilitation techniques are, for the most part, still remarkably low-tech. Therapists typically exercise patients' impaired limbs using repetitive hands-on maneuvers and mark improvements on clipboards. Because it's labor-intensive, the process is also expensive. Indeed, the annual price tag for the U.S. economy of stroke treatment is $30 billion and will likely escalate as Baby Boomers reach the peak stroke ages and drugs improve survival rates.

Select from the choices above to read the entire article.