Scientists from three universities found that increased, excessive napping could be a very early warning sign of Alzheimer’s disease.

The research was recently published in Alzheimer’s & Dementia – the Journal of the Alzheimer’s Association.

The researchers found while studying the brains of 13 deceased Alzheimer’s victims that what’s called wakening neurons were largely destroyed. The loss of neurons were found in the three areas of the brain that is charged with keeping us awake.

Napping is Fine if it’s Part of Your Routine

Researchers are quick to point out that if you are someone who naps regularly, this news shouldn’t be of concern to you.

“It only gets worrisome when it represents a change,” Lea Grinberg, professor of neurology at the University of California San Francisco, told USA Today. “For instance, in some cultures, it is pretty common to nap every day. That is quite okay.”

Studies show that Alzheimer’s patients tend to sleep more during the day, and they also frequently wake up at night, which is called fragmented sleep.

More Research is Needed

The study’s authors say this research will provide the foundation for clinical trials to try and confirm these findings. The group has received funding to continue researching changes in sleep patterns prior to the start of memory loss.

The Alzheimer’s Association has long advocated getting adequate sleep as one way to keep your brain healthy.