Somniloquy or sleep-talking is a parasomnia that refers to talking aloud while asleep. It can be quite loud, ranging from simple mumbling sounds to loud shouts and long, frequently inarticulate speeches, and can occur many times during a sleep cycle. As with sleepwalking and night terrors, sleeptalking usually occurs during delta-wave NREM sleep stages or during temporary arousals therefrom. It can also occur during the REM sleep stage, at which time it represents what sleep therapists call a motor breakthrough (see sleep paralysis) of dream speech: words spoken in a dream are spoken out loud. Depending on its frequency, this may or may not be considered pathological. All motor functions are typically disabled during REM sleep thus, motoric, i.e., verbal elaboration of dream content, could be considered an REM behavior disorder (see below). Sleep-talking can occur by itself or as a feature of another sleep disorder such as: Rapid eye movement behavior disorder (RBD) – loud, emotional or profane sleep talking Sleepwalking Night terrors – intense fear, screaming, shouting Sleep-related eating disorder (SRED) Sleep-talking is very common and is reported in 50% of young children, with most of them outgrowing it by puberty, although in rare cases it may persist into adulthood (about 4% of adults are reported to talk in their sleep). It appears to run in families. In 1966, researchers worked to find links between heredity and somniloquy. Their research suggests the following: Sleep-talking parents are more likely to have children who sleep-talk Sleep talking can still occur, though much less commonly, when neither parent has a history of sleep talking A large portion of parents begin to sleep-talk later in life without any prior history of sleep-talking during childhood or adolescence Sleep-talking by itself is typically harmless; however, it can wake others and cause them consternation—especially when misinterpreted as conscious speech by an observer.
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Added year ago by CHOI MINKI