Don't sleep without reading this news! Long-term sleep causes mental decline

“Disruptions in sleep duration and pattern may increase the risk of cognitive loss and Alzheimer's,” said Prof. Young from the University of Texas.

Experts don't know exactly why too much sleep can lead to dementia, but they think its effect on the biological clock (circadian rhythm) may play a role. Researchers from the Karolinska Institute in Sweden point out that too much sleep during the daytime can disrupt the brain's daily waste-clearing process.