At around 3 pounds in weight, the human brain is a staggering feat of engineering with around 100 billion neurons interconnected via trillions of synapses.
Throughout our lifetime our brain changes more than any other part of our body. From the moment the brain begins to develop in the third week of gestation to old age, its complex structures and functions are changing, networks and pathways connecting and severing.
During the first few years of life, a child’s brain forms more than 1 million new neural connections every second. The size of the brain increases fourfold in the preschool period and by age 6 reaches around 90 percent of adult volume.
The frontal lobes – the area of the brain responsible for executive functions, such as planning, working memory, and impulse control – are among the last areas of the brain to mature, and they may not be fully developed until 35 years of age.
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