People Who Lack of Sleep may Risk Higher Dementia

Consider it another strike against not getting enough sleep: A new study finds that getting too little REM sleep may be linked to a higher risk of dementia later in life.

REM, or “rapid eye movement,” sleep is one of four sleep stages, which also include two stages of light sleep and a stage of deeper sleep called slow-wave sleep. REM sleep is characterized by vivid dreams and high levels of brain activity, similar to the brain’s state when its awake. Humans typically cycle through several periods of REM sleep between the other stages of sleep each night.

In the new study, published today (Aug. 23) in the journal Neurology, researchers found that the people who developed dementia had gotten significantly less REM sleep when examined overnight years earlier compared with the people who didn’t develop cognitive problems. [Get Better Sleep in 2017]

The study does not prove that low levels of REM sleep cause dementia; rather, it shows an association between the two, said lead study author Matthew Pase, a senior research fellow at Swinburne University of Technology in Australia.

Pase offered several ideas for how REM sleep and dementia might be linked.

Mata Saya Merasa Lucu cari di Google untuk Gejala Spike Setelah Eclipse

A total solar eclipse wowed viewers across the United States on Monday (Aug. 21), but for many, this amazement was followed by worry about whether the eclipse had damaged their eyes or caused other symptoms.

Shortly after the celestial event, Google searches for terms such as “solar eclipse headache,” “eyes hurt” and “seeing spots” all increased, according to Mashable.

Fortunately, experts say that if your eyes felt a little strange after the eclipse, it’s not necessarily a reason to worry. It could be that you havedry eyes from keeping your eyes open too long, according to Dr. Vincent Jerome Giovinazzo, director of ophthalmology at Staten Island University Hospital in New York City. Giovinazzo told Live Science that he has already seen several patients who said their eyes felt funny after watching Monday’s eclipse, and they all had dry eyes.

If you did damage your eyes from looking at the eclipse, it would not be something you would feel. Rather, it would be something you would see. Symptoms of “solar retinopathy” — or damage to the eye’s retina that can occur from looking at the sun — are visual. (The retinas have no nerve fibers, so