Sleep talking, known as somniloquy, is a type of parasomnia. Parasomnias are unwanted behaviors that happen during sleep.
Sleep talking involves speaking out loud during sleep, which may or may not be intelligible to a listener.
The theme of conversation is generally harmless; however, it can sometimes be inappropriate or off-putting. Furthermore, it may occur frequently and be quite loud, thereby disturbing the slumber of an adjacent companion.
Sleep talking can occur during any phase of rest, and it's not yet clear whether it is connected to dreaming.
Sleep talking is quite a common occurrence, with estimates putting its lifetime prevalence at around 60-65%. It is thought to affect around half of all young kids and 5% of grown-ups, regardless of gender. Moreover, family history also seems to be a factor for this phenomenon.
If your sleep talking occurs more often, reemerges at an advanced age, or is coupled with additional signs such as limb motions or heightened fatigue during the day, it is important to discuss this with your doctor.
In many instances, treatment may not be required. If sleep talking is due to another sleep disorder, your medical provider will address the fundamental issue.