However, people who snore heavily or who have sleep apnea can experience hundreds of mini-arousals per night — even though they don’t realize it. The study group underwent brain scans, memory tests that were repeated at about 21 months, and an overnight sleep study done at their homes. Severe sleep apnea was associated with worrisome changes in the brains of middle-aged and older adults, a July 2018 study found. “We surmise that hypoxia may also have a deleterious effect on the volume of the regions of the medial temporal lobe. Studies such as these reinforce the need to be assessed by a sleep specialist and treated for sleep apnea.

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Persons: ”, Géraldine Rauchs, ” Rauchs, “, Rudy Tanzi, ” Tanzi, Tanzi, Rauchs Organizations: CNN, National Institute of Health, Medical Research, Harvard Medical School, Massachusetts General Hospital Locations: Caen, France, Boston, Massachusetts