Andrew Huberman· PhD
What the researchers found is that some fraction of these nuns had Alzheimer's disease, but nobody knew it when they were alive. Nobody saw any cognitive deficits. Why? It's because these these women died in their 90s. And to the day they died, they lived in these convents. And in the convents, they had social responsibilities. They had chores. They were fighting with their sisters. They were playing games with their fellow sisters. They were singing songs. They were doing things all the time. So they kept their brain active. So even as their brain was physically degenerating with Alzheimer's disease, they were building new roadways. They were building new bridges over these areas.