Sleep Talking – Overview
The medical term for this activity is "somniloquy." It occurs when you talk out-loud during sleep. A listener may or may not be able to understand what you are saying.
The subject matter being talked about tends to be harmless. It may also make no sense at all. At other times, the content may be vulgar or offensive to a listener. The talking can occur many times and might be quite loud. This can disrupt the sleep of a bed partner or roommate.
Sleep talking may occur in any stage of NREM sleep or REM sleep. It is still unknown if the talking is closely linked to dreaming.
Sleep talking is very common. It is reported in 50% of young children. About 5% of adults are reported to talk in their sleep. It occurs at the same rate in both men and women. It also appears to run in families.