Black Peacock, 1950
This mobile is a powerful example of how an art form can be tailored to the physiology of a specific area in the brain. Calder’s composition anticipated, artistically, the physiological properties of the cells of an area called V5, which are selectively responsive to motion and its direction. Viewed from a distance, the separate pieces of the mobile appear as static spots of varying sizes. But as the pieces move in different directions, each one stimulates only the category of cell that is selectively responsive to the direction in which the spot is moving. —Semir Zeki, Neuroscientist, University College London © Christie’s Images/Corbis. Via.