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Read about types of urinary incontinence and common causes, and get tips for bladder control, treatment, and managing urinary incontinence in older adults. Learn about Alzheimer's, a brain disease that causes memory loss and other cognitive impairment. It's the most common cause of dementia in older adults. Stroke: Signs, Causes, and Treatment Having a stroke is just as serious as having a heart attack. So, it’s important to know the signs of stroke and act quickly if you suspect you or someone you know is having one. Stroke is the fifth leading cause of death in the United States and is the number one cause of serious adult disability. What causes Parkinson’s disease? The most prominent signs and symptoms of Parkinson’s disease occur when nerve cells in the basal ganglia, an area of the brain that controls movement, become impaired and/or die. Normally, these nerve cells, or neurons, produce an important brain chemical known as dopamine. What causes dementia? Dementia is the result of changes in certain brain regions that cause neurons (nerve cells) and their connections to stop working properly. Researchers have connected changes in the brain to certain forms of dementia and are investigating why these changes happen in some people but not others. In Alzheimer's disease, damage to the brain likely starts a decade or more before memory and other cognitive problems appear. Learn about the toxic changes occurring in the Alzheimer's brain. Learn about a type of dementia called frontotemporal dementia that tends to strike before age 60, including cause, symptoms and diagnosis. Learn about Lewy body dementia, a progressive disease that is one of the most common causes of dementia, and read about possible symptoms and how the disease is diagnosed. What is Alzheimer’s disease, what causes it, what are the symptoms, and how is it treated? Get answers to these questions and more in this NIA fact sheet. How common is male infertility, and what are its causes? Infertility is defined clinically in women and men who cannot achieve pregnancy after 1 year of having intercourse without using birth control, and in women who have two or more failed pregnancies.

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