Last month, my wife and I found ourselves in a disagreement about whether or not our apartment was clean enough for guests—the type of medium-sized disagreement that likely plagues all close relationships. In the midst of it, there was a lull and, feeling exhausted all of a sudden, I got up and left the living room. In the bedroom, I immediately fell face down into the sheets. The next thing I knew it was 20 minutes later and my wife was shaking me awake. I hadn’t meant to fall asleep; I just felt so fatigued in that moment that there was nothing else I could do.
This wasn’t new for me. A few weeks earlier, I had come into conflict with an acquaintance over some money. We were exchanging tense emails while I was at my office, and I began to feel the slow oozing onset of sleep, the same tiredness that came on when, as a child, I rode in the backseat of the car on the way home from some undesired trip. A sleepiness that overtakes the body slowly but surely and feels entirely outside of your control.
Though this has happened many times before, my response to conflict still seems strange to me. After all, as everyone knows from 9th grade biology class, when faced with stress—an acute threat—our bodies enter fight-or-flight mode. It’s supposed to be automatic: the adrenal cortex releases stress hormones to put the body on alert; the heart begins to beat more rapidly; breathing increases frequency; your metabolism starts to speed up, and oxygen-rich blood gets pumped directly to the larger muscles in the body. The point is to become energized, to prepare to face the source of the conflict head on, or, at the worst, be ready to run away, at top speed.
Of course, you don’t actually want the stress response system to be too reactive. If you were constantly in fight or flight mode, constantly stressed, it could actually have long-term effects on your neurochemistry, leading to chronic anxiety, depression, and, well, more sleeplessness. Even so, it seems like a good idea to sometimes be on high alert when dealing with stressful situations.
But that’s not what my body did. My body shut down.
Read the rest in The Atlantic at http://www.theatlantic.com/health/archive/2013/12/why-some-people-respond-to-stress-by-falling-asleep/282422/