For many years, doctors have been working hard to determine what causes Alzheimer's disease. Due to the complex nature of the disease, the exact causes are not yet fully understood. However, strides are being made on a daily basis, and researchers have a much clearer picture of Alzheimer's than they did even a few years ago.
Most people with Alzheimer's disease have large quantities of junk called plaques and tangles built up in their brain. Plaques are deposits of a protein called beta-amyloid accumulating in the spaces between the brain's nerve cells. Tangles are deposits of a different protein called tau that accumulate and become twisted inside of the brain's nerve cells.
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