Sleep quality linked to brain health and increased medical risks

Obstructive sleep apnea (OSA) is a chronic condition characterized by repeated, involuntary interruptions in breathing during sleep. These episodes can last from seconds to minutes, occurring dozens of times per hour, which reduces blood oxygen levels and prevents the body from reaching deep, restorative sleep stages.

Clinical guidelines indicate that untreated OSA increases the risk of serious complications, including heart attack and stroke. Common warning signs include loud snoring, nighttime choking, morning headaches, dry mouth, and excessive daytime sleepiness, which can impair memory, focus, and mood.

Research published in the journal Neurology suggests that poor sleep quality in individuals aged 40 to 60 may lead to signs of brain aging. Furthermore, maintaining quality sleep is highlighted as a key factor in protecting brain health and potentially mitigating the risk of dementia. In Brazil, where millions are affected by dementia, controlling modifiable risk factors—including sleep hygiene—is considered vital for prevention.