The reason why we forget to celebrate our childhood

Researchers have found the answer to the question why the brain can forget memories from childhood.

Recently, scientists have found a new solution for why our brains cannot recall memories from early childhood. That's because new neuronal cell formation replaces old neurons, making it hard to remember memories of childhood.

A study conducted on rodents showed that new neurons are produced in the hippocampus region (or hippocampus) - the brain region responsible for memory formation. The production of this neuron in the hippocampus will occur throughout life but will gradually decrease with age.

Previous studies have shown that boosting new neuronal production in adult mice may enhance the ability to remember what they have learned. However, the development of new neurons can also degrade old memories.

"We were surprised to discover this. People often think that new neurons mean good memory," said study leader Sheena Josselyn . but the truth is not so.

Many scientists have thought that long-term memories can be attached to language because children often begin forming this type of memory at the same time they begin to speak. But the strange thing when they grew up, they forgot the old memories. "

Observing toddlers, Josselyn and her husband, co-author Paul Frankland, asked why children cannot retain memories in many situations and events. The researchers found that only one part of the brain - the hippocampus - to produce new neurons plays an important role in creating memories . But this new cell production will also diminish throughout childhood.

Neuroscientist Josselyn said: ' The more neurons you have, the more memories you will get in the future. But the memory is seen as a loop, so if you add a new round, it is possible that the old ring will be broken. '

Therefore, newly produced neurons play a useful role in clarifying old memories as well as paving the way for new memories.