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Brain Fills in Effects to Easily Decipher Motion in Japanese Line Drawing
Naoyuki Osaka admired line drawings by Hokusai Katsushika, and found that instead of using blur to suggest movement, as much modern art has done since the advent of photography, Katsushika created motion by drawing bodies in highly unstable positions.
And the technique is thought to work because the brain "fills in" the effects of gravity pulling the bodies down.
In earlier research it was shown that blurred photographs stimulate the same regions of the visual cortex as real-life motion, including the extrastriate visual cortex.
To discover whether sketches of unstable bodies would also activate these regions, Osaka showed Japanese students Katsushika's drawings while scanning their brains with functional MRI.
The scans revealed that drawings depicting motion did indeed prompt activity in the extrastriate visual cortex, unlike those of people or objects in static positions. Osaka concludes that there is a "common neural pathway" for interpreting implicit motion in art that is similar to the pathway used for perceiving real-life motion.
Patrick Johnston, a cognitive neuro-scientist at Swinburne University of Technology in Melbourne, Australia, said that these findings could help "unlock how the brain processes visual information," reports New Scientist.
However, Oron Catts of SymbioticA, a biological arts center at the University of Western Australia in Perth, warned that the influence of culture must not be ignored.
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