![]() This study also found that people with synesthesia generally have more white matter, indicating increased connectivity, in the fusiform gyrus, a brain area involved in the processing color, numbers, letters and faces. Thus, there are different neural mechanisms for these two kinds of synesthesia, finds Romke Rouw of the University of Amsterdam. In contrast, sensory areas of the brain show greater connectivity in those who believe that they are actually seeing these colors in the numbers. ![]() Ramachandran of the University of California, San Diego, presented the findings this week in a press conference at Neuroscience 2010, the Society for Neuroscience meeting.Īmong the findings are that the hippocampus, a brain region essential for memory, has extra connections in people who say that certain numbers remind them of particular colors. Now, scientists have new clues about how the brains of people with synesthesia give rise to these bizarre-seeming perceptions. Here's how color vision works, by the way. For some, it's just an association others actually do think they see those colors. The actual experience varies, but some say that numbers, letters, sounds or even faces appear to have colors associated with them that most people don't see. ![]() In a condition called synesthesia, there are extra connections among parts of the brain related to individual senses. For a special 2 percent of the population, the world seems a little more surreal.
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