Why do newborns laugh when they sleep?

Babies are very important to every family, but the baby's health is also the most worrying issue for parents. There are often many inexperienced parents who don't know what's going on when their babies show some symptoms. Many parents will find that their newborns laugh when they sleep, but they don't know what's going on. They don't know if the baby has any disease. Let's learn about why newborns laugh when they sleep.

Why do newborns laugh when they sleep?

Human sleep is rhythmic, with deep sleep and light sleep alternating repeatedly until one wakes up. Studies have shown that during deep sleep, the human cerebral cortex cells are in a state of full rest, which is extremely important for stabilizing emotions, balancing mentality, and restoring energy. At the same time, the human body can produce many antibodies to enhance disease resistance. Studies have shown that the first three hours of sleep are very important because deep sleep accounts for almost 90% during this period.

Because the baby's nervous system and brain are not yet fully developed, the baby's sleep cycle is only 60 minutes. After a cycle, the baby wakes up automatically. If there is no hunger or urination, it will automatically switch to the next sleep cycle. Newborns are in a light sleep state most of the time, so it is normal to have this reaction.

Human sleep is rhythmic, with deep sleep and light sleep alternating repeatedly until one wakes up. Studies have shown that during deep sleep, the human cerebral cortex cells are in a state of full rest, which is extremely important for stabilizing emotions, balancing mentality, and restoring energy. At the same time, the human body can produce many antibodies to enhance disease resistance. Studies have shown that the first three hours of sleep are very important because deep sleep accounts for almost 90% during this period. Normal human sleep generally consists of several cycles of light sleep, deep sleep, and then light sleep again. The same is true for babies. First, the baby enters deep sleep, when he sleeps very soundly and is not easy to wake up. It usually lasts 70-120 minutes, and then turns to light sleep for 20-30 minutes, alternating 3-5 times a night.

The above is an introduction to why newborns laugh while sleeping. After understanding it, we know that this phenomenon is relatively normal. It is generally caused by the incomplete development of the facial nerves of newborns and the shallow sleep. Therefore, parents should not worry too much when encountering such symptoms. In addition, if there is any abnormality in the process of caring for the baby, you should consult a doctor in time.