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Associative Learning between Orientation and Color in Early Visual Areas Kaoru Amano 1,2,3 , Kazuhisa Shibata 3,4 , Mitsuo Kawato 3 , Yuka Sasaki 3,4 , Takeo Watanabe 3,4 1Center for Information and Neural Networks 2Japan Science and Technology Agency.presto sakigake 3Advanced Telecommunications Research Institute International (ATR) 4Brown University Keyword: デコーディング , ニューロフィードバック , 機能的MRI , 視覚 , 連合学習 , decoding , neurofeedback , functional magnetic resonance imaging , vision , associative learning pp.941-947
Published Date 2017/8/1
DOI https://doi.org/10.11477/mf.1416200846
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Abstract

Associative learning is an essential neural phenomenon where the contingency of different items increases after training. Although associative learning has been found to occur in many brain regions, there is no clear evidence that associative learning of visual features occurs in early visual areas. Here, we developed an associative decoded functional magnetic resonance imaging (fMRI) neurofeedback (A-DecNef) to determine whether associative learning of color and orientation can be induced in early visual areas. During the three days' training, A-DecNef induced fMRI signal patterns that corresponded to a specific target color (red) mostly in early visual areas while a vertical achromatic grating was simultaneously, physically presented to participants. Consequently, participants' perception of “red” was significantly more frequently than that of “green” in an achromatic vertical grating. This effect was also observed 3 to 5 months after training. These results suggest that long-term associative learning of two different visual features such as color and orientation, was induced most likely in early visual areas. This newly extended technique that induces associative learning may be used as an important tool for understanding and modifying brain function, since associations are fundamental and ubiquitous with respect to brain function.


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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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