14/03/2026
Infants spend more time in REM (rapid eye movement) sleep than adults 😴
REM sleep is the stage of sleep in which dreams commonly occur. In newborns, REM sleep can make up around 50% of their sleep (compared to 20-25% in adults) 👶🏽
This high proportion of REM sleep reduces as the child grows older and their needs change 🌸
One of the reasons it is thought that infants have such a high amount of REM sleep is because it plays a role in the maturation of the nervous system 🧠
Infants may enter REM sleep almost immediately after falling asleep as their sleep cycles are much shorter than older children and adults 😴
This way infants may get a lot of REM sleep even in short naps 👍🏻👍🏻👍🏻
REM sleep is particularly associated with consolidation of PROCEDURAL and SPATIAL memory, brain development, and learning, while non-REM sleep is linked with physical rest and restoration, growth, and the consolidation of DECLARATIVE memory 🤩
In the early stages of life, infants are learning a tremendous amount of new motor skills and behaviors, and this involves a great deal of PROCEDURAL memory (improved by REM sleep) 😴
They are learning how to control their bodies, how to coordinate their eye movements, how to grasp objects, how to vocalize sounds, how to crawl, and eventually, how to walk. All of these are examples of PROCEDURAL learning 🧠
On the other hand, while DECLARATIVE memory also begins to develop during infancy, it becomes much more influential as children grow and start to acquire language skills etc - hence the need for more non-REM sleep as they get older - the sleep cycles change with new needs 😴
Given this, parents can indeed take comfort in the fact that short naps and frequent awakenings are completely normal, and these short sleep periods still provide valuable REM sleep for their baby’s brain development 🧠
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