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No new ‘learning’ brain cells after age 13: study

Around the age of 13, the human brain region that hosts memory and learning appears to stop producing nerve cells, said a study Wednesday described as "sobering". The finding challenges a widely-held view that the brain's hippocampus region continues to generate neurons, which transmit information through chemical and electrical signals, well into adulthood in humans, as in other mammals. Neurons are the cells that allow animals to react to their environment by transferring data about external stimuli such as a smell…