We all know whether we are left-handed or right-handed; hardly any of us know whether we are left-faced. Yet according to Professor Karl Smith of the University of Wisconsin we are all almost【B1】______one or the other. Right-faced people are more【B2】______than left-faced people, and there is a striking【B3】______between left-facedness and musical talent. Beethoven was left-faced.【B4】______were Brahms, Schubert, Wagner, Tchaikovsky and the【B5】______of other well-known living performers of all kinds of music. The idea of facedness【B6】______from many years of computerized study of peoples lip, tongue and jaw movement【B7】______they were talking. Smith and his colleagues found that in most people one side of the face was more【B8】______than the other. There are other【B9】______of facedness, some of which can be【B10】______in static pictures; in right-faced people the right-side of the face is【B11】______compressed between jaw and brow; the right eyebrow tends to be higher; dimples and wrinkles are less【B12】______than on the left. From a study of more than 500 people Smith found that the【B13】______of right-faced people【B14】______about nine in ten among Americans to two in three among Acapulco Mexicans. The fact that【B15】______twins were always both right-faced or left-faced suggests a【B16】______origin for facedness. Those talented musical artists—'singers and instrumentalists who perform. classical, operatic, country and jazz music are almost without exception left-faced.' Smiths findings【B17】______with theories that the right hemisphere of the brain(which controls the left side of the face)is【B18】______for musical performance, the left hemisphere for【B19】______. The idea of facedness, he says, 'suggests new【B20】______to the study of all aspects of cerebral dominance and its relation to handedness and speech disabilities'. 【B1】