![]() ![]() ![]() They chose those graphemes that the synesthetes reported elicited specific colors. In one such experiment, they presented six synesthetes with patterns of black letters or numbers-known as "graphemes"-on a white background. In their experiments with synesthetes who report seeing colors when they view numbers or letters, the researchers first sought to determine whether synesthetes really see the colors. Now, however, researchers such as Hubbard and his colleagues are using the condition to gain insights into the neural basis of perception. ![]() The rare condition called synesthesia-in which people's sensory perceptual circuitry seems to be miswired-was long dismissed as an oddity not worthy of scientific study. This cross-activation might develop, they theorize, by a failure of the "pruning" of neural connections between the areas in the developing brain. Some synesthetes report seeing colors when listening to music, or feeling tactile shapes while tasting food. The researchers said their findings lend support to the hypothesis that the condition is due to cross-activation between adjacent brain areas involved in perceiving shapes and colors. What's more, functional magnetic resonance imaging (fMRI) of their brains reveals that they show activation of color-perception areas. Hubbard of the University of California San Diego, have found. People with a form of synesthesia in which they see colors when viewing letters and numbers really do see colors, researchers, led by Edward M. ![]()
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