HANS-ULRICH OSTERWALDER / SCIENCE PHOTO LIBRARY HANS-ULRICH OSTERWALDER / SCIENCE PHOTO LIBRARY
Alzheimer's disease. Conceptual artwork of a brain and nerve cells to depict dementia due to Alzheimer's disease. A sagittal slice through the brain is overlain with nerve cells. The nerve cells (neurons) have long axons and dendrites, and cell bodies (triangular-shaped). At bottom the image of a face is repeated on a staircase, getting smaller as the staircase gets higher. Dementia is a general decline in mental ability and progressively gets worse. The most common cause of dementia is Alzheimer's disease in which the brain's nerve cells degenerate and the size of the brain substance shrinks.
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