JACOPIN / SCIENCE PHOTO LIBRARY JACOPIN / SCIENCE PHOTO LIBRARY
BRAIN, DRAWING Development of a child's brain cell network. Illustration of the development of a child's brain cell network, at 9 months, 2 years and 4 years of age. The top of the image shows the brain surface and the bottom corresponds to its interior area. Initially,the neurones multiply and connect until at the age of four, the number of neurons begins todecrease.
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