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Perhaps the work mentioned by V.S. Ramachandran regarding the "martian" colurs reported by a colour blind man with synaesthesia. He "sees" colours when he looks at a number and some of thse colours are ones he does not see otherwise. I don't know if anyone has tried to determine if one on his "martian" colours is consistent with the description of any "real" colour. This seems to imply that there exists a brain label for colour that is usually activated by signals from the appropriate opsin but that can be activated by a "misfiring" in a synaesthetes brain.
http://psy.ucsd.edu/chip/pdf/SciAm_2003.pdf
The above link is to a Scientific American article.
Permalink Sat, 12 Jun 2010 18:16:56 UTC | #479679