New born babies learn even in their sleep

New born babies are such fast developers because they keep learning even in their sleep, researchers have found.

Even though infants may stay awake for just a few hours a day, their brains keep working around the clock, scientists said.

They believe that the brain is constantly adjusting and adapting to the physical world despite appearances that they are dozing.

The discovery was made by experts at the University of Florida after simple experiments with 26 sleeping newborns.

Researchers played a tune to them, and then followed it with a gentle puff of air to the babies' eyelids. After about 20 minutes, 24 of them had learned to anticipate the puff by squeezing their eyes shut.

The babies' brain waves also changed.

Dana Byrd, a psychologist, said, "We found a basic form of learning in sleeping newborns, a type of learning that may not be seen in sleeping adults.

"They are better learners, better 'data sponges' than we knew. While past studies find this type of learning can occur in infants who are awake, this is the first study to document it in their most frequent state, while they are asleep.

"Newborn infants' sleep patterns are quite different to those of older children or adults in that they show more active sleep where heart and breathing rates are very changeable.

"It may be this sleep state is more amenable to experiencing the world in a way that facilitates learning."

The results, published in the journal Proceedings of the National Academy of Sciences, could be used to identify babies that are not developing properly such as those at risk of dyslexia or autism, she added.

Wiring of the Brain

“Wiring of the brain” refers to the explosive burst of the connections between the various synapses of the brain cells after birth. Synapses are the telephone lines that enable brain cells to communicate. Trillions are formed during the First 2 years of life. It is believed that they are overproduced to guarantee that enough are available to form neural networks for vision, speech, thinking, emotions, and other mental capabilities.

Some parts of the brain (example, the visual cortex) are wired rapidly in the First year of life and need little coaxing other than exposure to people, objects, and movement to develop. The auditory cortex, which processes sound, explodes with new connections after birth and maintains this high level of activity until about age 12. Many experts now believe this is the best time for learning music and foreign languages.

The prefrontal cortex, which is involved in processing higher thoughts and motivation, undergoes an initial growth spurt after birth, but it does not appear to be fully developed until early adolescence. This may be the best time to teach such things as calculus. The great explosion of synapses after birth enables the brain to learn how to make it work from the experiences it encounters.

Synapses that are not activated by sounds, touch, sight, smell, or taste are discarded. Nearly half of the connections eventually are pruned away when they are not incorporated into neural networks.