Chimeric Faces and the Split Brain (a) When a person with a split brain views a chimeric face of Brad Pitt and Leonardo DiCaprio, her left hemisphere is aware only of Leonardo DiCaprio and her right hemisphere sees only Brad Pitt. (b) When asked whom she sees, she answers, “Leonardo DiCaprio,” because speech is controlled by the left hemisphere. (c) When asked to point to the face she saw with her left hand, she points to Brad Pitt because her right hemisphere is only aware of the left half of the picture.

PHOTO OF BRAD PITT: AP PHOTO/ALEX BRANDON; PHOTO OF LEONARDO DICAPRIO: AP PHOTO/TAMMIE ARROYO