An hour or two after my school-age son has gone to bed, he sometimes wakes up from a nightmare, walks to my room and mumbles incoherently about what’s scaring him. But he seems off, and I can't get ...

Ever woken up to find your socks in the fridge or your keys in the sink, with no memory of how they got there? Sleepwalking isn’t just a quirky movie trope. It’s a real sleep disorder affecting people ...