Alzheimer’s origins tied to rise of human intelligence

Modern humans emerged about 200,000 years ago.Alzheimer’s disease may have evolved alongside human intelligence, researchers report in a paper posted this month on BioRxiv1.

The study finds evidence that 50,000 to 200,000 years ago, natural selection drove changes in six genes involved in brain development. This may have helped to increase the connectivity of neurons, making modern humans smarter as they evolved from their hominin ancestors. But that new intellectual capacity was not without cost: the same genes are implicated in Alzheimer’s disease.

Source: Alzheimer’s origins tied to rise of human intelligence : Nature News & Comment

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