Brain health Archive

About two-thirds of people over 65 have periodontal disease, which is linked to a higher risk of heart disease. Shared risk factors such as smoking and an unhealthy diet may explain the association, but bacteria and inflammation could be a common thread. The bacteria responsible for periodontal disease can travel to blood vessels throughout the body and have been found in the fatty debris (atherosclerosis) that clogs arteries located far from the mouth-and in blood clots from people who have experienced heart attacks.

A 2024 study suggested that closely following the MIND diet, which emphasizes plant-based foods and limited animal products and saturated fats, may slow cognitive decline compared to other eating patterns.

About three million American adults have epilepsy, which is marked by recurring seizures. But far more people will have a seizure that strikes for another reason. Seizure triggers include high fever, head injury, extreme lack of sleep, blood sugar fluctuations, alcohol or drug misuse, certain medications, brain infections, stroke, and eclampsia. People can help someone having a seizure by moving them away from hazards, preventing choking, and tracking details. Most seizures are not a medical emergency.

At some point, most older adults experience the occasional "senior moment" where they misplace an everyday object, lose their train of thought during a conversation, or forget why they walked into a room. Memory lapses like this are part of normal aging, but the problem can be exacerbated by issues like depression, stress, poor sleep, and medication side effects. If these episodes become so frequent or substantial that they interfere with a person's daily life or safety, it's time to see a doctor.

Some scientists believe that microbes might play a part in Alzheimer's disease development. They say it could be that certain viruses or bacteria that infect the brain aren't completely eradicated by the immune system, which leads to neuroinflammation and brain cell death. It could also be that microbes trigger the release of protein deposits-amyloid-beta plaques and tau tangles-which kill neurons, further increase neuroinflammation, and lead to more neuron death.

A 2024 study of more than 200,000 adults, combined with findings from 19 other studies (for a total of 1.25 million people), tied eating ultra-processed foods-particularly sugary drinks and processed meats-to an increased risk for heart disease.