When he learned in 1995 that he had Alzheimer's disease, William Utermohlen, an American artist in London, began painting himself to understand his disorder. His self portraits are being exhibited at the New York Academy of Medicine in Manhattan, by the Alzheimer's Association. The paintings starkly reveal Utermohlen's descent into dementia, as his world began to tilt, perspectives flattened and details melted away. His wife and doctors said he seemed aware at times that technical flaws had crept into his work, but he could not figure out how to correct them. Professors claimed that his spatial sense kept slipping, and that he was aware of it. A psychoanalyst wrote that the paintings depicted sadness, anxiety, resignation, and feelings of feebleness and shame. Dr. Bruce Miller, a neurologist at the University of California, San Francisco, who studies artistic creativity in people with brain diseases, said some patients could still produce powerful work. "Alzheimer's affects the right parietal lobe in particular, which is important for visualizing something internally and then putting it onto a canvas," Dr. Miller said. "The art becomes more abstract, the images are blurrier and vague, more surrealistic. Sometimes there's use of beautiful, subtle color." William Utermohlen, 80, is now in a nursing home. He no longer paints. His work has been exhibited in several cities, and more shows are planned. The interest in his paintings as a chronicle of illness is bittersweet, his wife said, because it has outstripped the recognition he received even at the height of his career. "He's always been an outsider," she said. "He was never quite in the same time slot with what was going on. Everybody was doing Abstract Expressionist, and there he was, solemnly drawing the figure. It's so strange to be known for something you're doing when you're rather ill."