Brain and Cognitive Health Archive

Alzheimer's disease and other forms of dementia affect all the regions of the brain involved in driving, but whether or not a person should give up driving depends on the severity of the disease and the specific cognitive abilities that are impaired.

A 2022 study found that low blood levels of vitamin D (under 25 nanomoles per liter) were linked with higher risks of dementia. People can boost vitamin D levels from diet, supplements, or sun exposure.

Occasional forgetfulness and memory lapses are often dismissed as a sign of normal aging. But if these episodes become more frequent or problematic, or if they affect daily life, older adults should consult their primary care physician, A doctor can offer an evaluation for mild cognitive impairment. This includes a brief in-office screening test of thinking skills like short-term recall, concentration, attention, ability to juggle multiple tasks, and orientation to time and place.

The American Heart Association added sleep to its list of factors for cardiovascular health. The others are a healthy diet; physical activity; low levels of nicotine exposure; and healthy levels of weight, cholesterol, blood sugar, and blood pressure.

Vascular dementia, which arises from longstanding, cumulative damage to small blood vessels in the brain, may cause or contribute to up to half of cases of dementia. The vessels may thicken or become blocked by blood clots, causing tiny strokes that damage specific parts of the brain important for various thinking abilities. Keeping blood pressure in the recommended range of 120/80 or lower is the best way to prevent vascular dementia.

Soil and water pollution from heavy metals, pesticides, and microplastics may affect a person's risk of cardiovascular disease. These pollutants can enter the body when people eat crops grown in dirty soil, drink water contaminated by dirty soil, or inhale soil dust. Lead, cadmium, and arsenic are among the most pressing concerns. Potentially helpful actions include testing one's drinking water, buying organic foods, and minimizing plastic use.

Renewed research into the potential benefits of psychedelic drugs has led to interest in microdosing — taking a fraction of a regular dose. Many people believe that microdosing can help them, but the evidence from some recent studies is mixed.

A 2022 study found that survivors of severe COVID-19 infections can develop cognitive problems, such as brain fog or trouble finding words, equivalent to the loss of 10 IQ points or 20 years of aging.

Around menopause, a decline in estrogen can trigger low-grade inflammation that leads to unexpected symptoms from head to toe. Symptoms can affect the digestive tract, skin, joints, eyes, ears, and heart, among other areas. A 2022 study found that estrogen loss can even fuel the jaw pain known as temporomandibular disorder. A year or longer can pass before many women connect symptoms with menopause. Women can take lifestyle measures to lower inflammation, such as eating more fruits and vegetables, avoiding processed foods, and exercising.

Healthy older adults may have a higher risk for dementia if they follow high-inflammatory diets that include greater amounts of simple sugars, cholesterol, saturated fat, and fried foods.