What鈥檚 the colour of a trumpet blast? David Hockney, Wassily Kandinsky and other synaesthetes could tell you
LETTERS, words, numbers, sounds, touch, pain and smell all trigger flashes of colour in 鈥榮 mind. The New York-based artist first discovered she could paint her synaesthetic visions after a visit to her acupuncturist. 鈥淓ach time a needle went in a colour flashed in front of my eyes,鈥� she recalls. 鈥淲hen all the needles were in it was like watching a movie. I rushed home and realised I could recall enough to paint a part of what I had seen.鈥�
Other synaesthetic artists include David Hockney and Wassily Kandinsky, who painted the piece below, entitled Blue. There is still some speculation over whether Kandinsky actually had synaesthesia or was simply influenced by reports of the phenomenon in other people. But to of the Smith-Kettlewell Brain Imaging Center in San Francisco, who has analysed Kandinsky鈥檚 work, it is obvious (Journal of the History of Neuroscience, vol 12, p 223). 鈥淚t鈥檚 very explicit in his work and his writings. He went to a performance of Wagner鈥檚 music and then wrote about how vivid the visual impressions of the horns were and the colour that the music evoked in his mind. That鈥檚 synaesthesia,鈥� he says.
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Steen agrees: 鈥淚 saw a sphere like the one in Kandinsky鈥檚 Blue in one of my acupuncture sessions. Since it is really hard to explain your visions to someone, I assume Kandinsky was a synaesthete.鈥� The striking colour contrast with the red dot is also familiar to her.
These experiences are probably due to extra connections between the auditory and visual cortex, says , a mathematical neuroscientist at the University of Chicago. He thinks the additional flow of information into the visual cortex overloads its normal inhibitory mechanisms, allowing spontaneous waves of activity that would normally be eliminated to propagate through the brain. These signals may represent shape or colour. Since the brain can鈥檛 tell whether a signal was generated within the brain or externally, synaesthetes see the shapes as if they came from the eye.
Steen, Kandinsky and Hockney join a long line of synaesthetic poets, authors and composers. But are synaesthetes naturally more creative? Jamie Ward at the University of Sussex in Brighton, UK, found that people with the condition were more likely to be engaged with the arts than non-synaesthetes, whether through pursuing a creative hobby like painting or, more passively, through visiting art galleries, for example ().
But while synaesthetes also tended to score higher on some measures of creativity, those that performed best in these tests were no more likely to take up an artistic hobby than those who scored worst. This suggests synaesthetes don鈥檛 take to art simply because they鈥檙e good at it. On balance, Ward thinks people with synaesthesia put brush to canvas simply because they want to express their strange experiences.
Read more: Six ways that artists hack your brain
