What is Pick's disease?

According to Arnold Pick, who first described the disease in 1892, Pick's disease causes an irreversible decline in a person's functioning over a period of years. Although it is commonly confused with the much more prevalent Alzheimer's disease, Pick's disease is a rare disorder that causes the frontal and temporal lobes of the brain, which control speech and personality, to slowly atrophy. It is therefore classified as a frontotemporal dementia, or FTD.