The medical definition of dementia is:

Severe impairment or loss of intellectual capacity and personality integration, due to the loss of or damage to neurons in the brain.

Alzheimer’s disease is a brain disorder named for German physician Alois Alzheimer, who first described it in 1906. Much has been learned about the disease in the last 100+ years, but there still is no cure.

Many advances in treatment (both medical and non-medical) have emerged in recent years and the scientific community holds high hopes for recent research into the disease.

Although the vast majority of American's know the of the term Alzheimer's Disease, few have any clue about the details of the disease and therefore there is much fear in the general population regarding the disease (Alzheimer's disease has been listed as the second biggest medical condition concern among seniors after cancer, and well ahead of heart disease).

Alzheimer's disease is the most common cause of dementia. It involves parts of the brain that control thought, memory, and language. Alzheimer's damages a person's ability to reason, remember, speak,  and carry out routine tasks.

Not everyone who suffers from memory loss as they age will get Alzheimer's disease. But current research shows that one in five over the age of 70 will get the disease.