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 ...

Sleepwalking, medically known as somnambulism, is a phenomenon that has intrigued and puzzled both scientists and laypeople for centuries. This condition, which affects millions of people worldwide, ...

Most of us have seen the classic television trope of a sleepwalker: a person, arms outstretched, staggering about the house as if directed by a video game controller. But what is sleepwalking, exactly ...