It's 2 a.m. The house is quiet, cloaked in the stillness of the night. Then, a shuffle. A door creaks. A child walks down the hallway, eyes wide open but fast asleep. Elsewhere, someone mumbles ...

You wake up to your partner telling you that you had an entire conversation with someone named Bob last night, or your roommate mentions you were giving what sounded like a presentation in your sleep.

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Sleep talking (also know in the sleep field as "somnliloquy") is a sleep disorder that involves unconscious talking during sleep. Sleep talking varies in its content and presentation, ranging from ...

Sleep talking might sound funny, but it’s often a sign of something deeper. It starts with a mumble. Maybe a laugh. Sometimes even a full-blown rant. But the person lying next to you has no idea they ...

Hearing that you’ve been mumbling out loud while you dream might lead you to try to figure out how to stop sleep talking. We consulted with medical experts and sleep specialists and turned to the ...

Nearly everyone has a story about people talking in their sleep. Though it tends to be more common in children, it can happen at any age: A 2010 study in the journal Sleep Medicine suggested that ...

Most sleep talkers are blissfully unaware of their condition. We’re deep in dreamland and apart from the odd sleep-scream that wakes us up from our slumber, it’s mostly a harmless quirk. I’m a ...

You’ve likely experienced it – waking to find your partner urgently informing you that you spent half the night having an animated conversation with no one. Or perhaps you’ve been the one awakened by ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

A reader asked, after reading my last post on 11 reasons a good night's sleep is so important: What is happening in the brain when kids talk while sound asleep? (I am usually asleep when this happens, ...