Why do I talk in my sleep? A sleep psychologist explains

Sleep is a natural part of life, but it may not be fully understood by all. As a sleep psychologist, I often receive questions about various aspects of sleep, including why people talk during their slumber. Sleep occurs in multiple stages, with about a quarter of the night spent in REM sleep, where most dreaming takes place. The rest of the night is divided between non-REM sleep, which makes up the majority of sleep time and is crucial for rest and repair, and REM sleep, which increases in proportion as the night progresses.

During sleep, different parts of the brain remain active. When the language centers are active and the muscles responsible for speech are relaxed, sleeptalking can occur. This phenomenon is not always words but rather mumbles, laughs, or whispers. When language is used, it's often questions or profanity, and rarely are the statements polite. Rarely do the words uttered align with polite conversation or conflict resolution.

Research suggests that about two-thirds of people have experienced sleeptalking at some point. This is especially common in children, who have more slow-wave non-REM sleep, which may contribute to the frequency of sleeptalking. The brain does not shut down entirely during sleep; instead, various parts remain active to maintain essential functions such as memory consolidation, growth, and immune system support.

Doctors recommend adequate sleep for all ages, with teens needing 8-10 hours and younger children needing even more.

While sleeptalking itself is generally harmless, it can sometimes lead to other parasomnias like sleepwalking or night terrors. It's more prevalent in childhood but tends to decrease with age. If sleeptalking is a concern or accompanies other sleep disturbances, consulting a sleep psychologist can provide guidance and potential interventions. In essence, while sleeptalking may be perplexing, it is a normal part of the sleep cycle for many people, and understanding it can help alleviate any undue worry.