A Botox gap in understanding emotion

Not only do our facial expressions reflect our emotional ups and downs, they appear to send crucial feedback to our brain, suggests a growing body of research. Without that full feedback loop, our ability to understand — and be understood — might be constrained.

In a recent study of women undergoing cosmetic treatment with Botox, researchers found that the treatment, which blocks facial nerve impulses, seemed to slow the ability to comprehend emotional language.

"We know that language moves us emotionally," said the lead author, David Havas, a psychology graduate student at the University of Wisconsin-Madison. "What this study shows is that that's partly because it moves us physically."