Reason for talking during sleeping
Sleep talking falls under the category of parasomnias, which are disruptive sleep disorders. Other parasomnias include sleepwalking, bedwetting, and night terrors.
Sleep talking tends to occur during two different stages of sleep: During stage two, when it's just a stream of thoughts not accompanied by a dream, and during rapid eye movement (REM) sleep, when it's accompanied by active dreams. During REM sleep it's easy to arouse a person out of sleep talking, but during stage two, it's very hard to wake someone up, and they likely won't remember what they were talking about. And even during REM sleep, what a sleep-talker is saying may not be related to what's happening in their dream.
if you feel overly tired during the day, if your nocturnal chatter is disturbing your partner, or if your sleep talking is accompanied by any other "acting out," such as sleepwalking. If you're feeling sleepy all the time, a sleep specialist can help determine the best course of action to ensure you get better sleep.
Posted by Rebecca L. Charles 1/23/15