The total brain weight for an average person in their 80s is about 50% less than for a person in their 50s.

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Quizplus · Accepted Answer

While it's true that the brain can shrink with age, the average reduction in brain weight from the age of 50 to the 80s is not as drastic as 50%. The brain does lose weight and volume as a part of the aging process, but this loss is generally around 5% per decade after the age of 40, not 50% overall.

The Total Brain Weight for an Average Person in Their