You're at your daughter's softball game, trying to put on a happy face. But the day's frustrations loop endlessly in your thoughts. Your boss didn't acknowledge your hard work. Your spouse forgot to mention this game until the last minute. And your colleague? You're pretty sure they're going to bai...

A scalpel moves with precision. The neurosurgeon's hands are steady, but her body is running on caffeine and adrenaline, five hours deep into a shift with no break.

An ER physician makes a life-saving call, though his nervous system hasn't downshifted in months.

Meanwhile, a hospital administrator...