From my archives … Many of you may have seen the Ted video by Jill Bolte Taylor, the neuroanatomist and spokesperson for the Harvard Brain Tissue Resource Center who survived a stroke in 1996, at age 37, to describe the shifts in her brain that took place as part of her recovery. Fascinating stuff. And...

Two bombs explode yesterday in the crowded streets near the finish line of the Boston Marathon. Three people are killed, including an 8-year-old watching his father run, and more than 130 are injured. But there are thousands that will leave the race with posttraumatic stress symptoms. Although not all will develop what we define today...