During the REM phase of sleep, the baby’s brain assimilates and stores all the information that babies receive during their wakeful and alert hours. Babies are in an almost constant state of motor skill learning and coordination. They have a lot of new material to consolidate and, therefore demand more of sleep. Hence, sleep appears to play a key role in human development, and interferences to their REM sleep could undermine their learning.
A new study, published online in Nature Neuroscience, from researchers at Harvard Medical School and Boston’s Beth Israel Deaconess Medical Center, argues that sleep deprivation also hampers the brain’s ability to make new memories.