Why Do People Talk in Their Sleep? What Science Knows and When It Matters
Sleep talking catches most people off guard the first time they hear it, a mumbled sentence, a name spoken into the dark, sometimes a full conversation directed at nobody. The person in bed has no idea any of it is happening. For bed partners, roommates, or parents listening from the hallway, it can range from amusing to unsettling, depending on what gets said and how often it occurs. And the questions it raises are genuinely interesting. What is the brain doing during those moments? Is it replaying the day, processing emotion, or just misfiring signals during a transition between sleep stages? Sleep talking, known in medicine as somniloquy, is one of the more common sleep behaviors across all age groups. It tends to be dismissed…












