Hypothyroidism is a medical condition that occurs when your thyroid gland does not produce enough of certain chemicals or hormones required for proper functioning. Dementia is a commonly overlooked symptom of the condition that often becomes misdiagnosed.

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IN-DEPTH: Frontotemporal dementia (FTD), sometimes called frontal lobe dementia, describes a group of diseases characterized by degeneration of nerve cells - especially those in the frontal and temporal lobes of the brain. Experts believe FTD accounts for 2 to 10 percent of all cases of dementia. People with FTD live with the disease for an average of 5 to 10 years after diagnosis.

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In the last several years, scientists have made several breakthroughs in the area of Huntington's disease (HD) research. With these advances, our understanding of the disease continues to improve. This article presents information about HD, and about current research progress. It is written for health professionals, scientists, caregivers, and, most important, for those already too familiar with the disorder: the many families who are affected by HD.

Vascular dementia is the second most common cause of dementia, after AD. It accounts for up to 20 percent of all dementias and is caused by brain damage from cerebrovascular or cardiovascular problems - usually strokes.

Although not all strokes cause dementia, in some cases a single stroke can damage the brain enough to cause dementia. This condition is called single-infarct dementia.

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