达·芬奇的《蒙娜丽莎》肖像画是传世珍品，现存巴黎罗浮宫。初一看，觉得画中人物娴静、温柔、安谧、慈祥，略带微笑。稍作停顿，突见她笑容消失；过一会儿，微笑又回来了。尽管神态依然如故，微笑时隐时现，感觉却不一样。对此，专长研究视觉成像机理的美国神经生物学家玛格 Leonardo da Vinci’s “Mona Lisa” portrait is handed down treasures, the existing Louvre in Paris. At first glance, I think the characters in the painting are demure, gentle, tranquil, kind and slightly smiling. A pause, suddenly saw her smile disappear; after a while, the smile is back. Although the demeanor is still the same, when you are smiling, it feels different. In this regard, the United States specializing in visual imaging mechanism of neuroscientist Marg