In late adulthood, the brain shrinks and total brain mass declines, beginning at age 30 and accelerating at age 60, so that by age 80, most people have lost __________ of their peak brain mass.

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26-08-2022
Social Studies

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In late adulthood, the brain shrinks and total brain mass declines, beginning at age 30 and accelerating at age 60, so that by age 80, most people have lost __________ of their peak brain mass.

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smecloudbird18 smecloudbird18 · Answer 1 · 2022-09-03T06:44:00-04:00

In late adulthood, the brain shrinks and total brain mass declines, beginning at age 30 and accelerating at age 60, so that by age 80, most people have lost 5-10% of their peak brain mass.

Early in life, the brain makes over a million new neural connections every second. By age 6, brain size increases to about 90% of adult size. Then, in his 30s and into his 40s, the brain begins to shrink, accelerating until 60. Like wrinkles and gray hair that appear in late adulthood, the appearance of the brain also begins to change.

And changing of your brain physically means changing of your cognitive abilities. Although the overall brain mass decreases with age, the specific regions of the brain responsible for cognitive functions, the frontal lobe and the hippocampus, shrink more than others.

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