MISC

査読有り
2017年8月1日

Associative learning between orientation and color in early visual areas

Brain and Nerve
  • Kaoru Amano
  • ,
  • Kazuhisa Shibata
  • ,
  • Mitsuo Kawato
  • ,
  • Yuka Sasaki
  • ,
  • Takeo Watanabe

69
8
開始ページ
941
終了ページ
947
記述言語
日本語
掲載種別
書評論文,書評,文献紹介等
DOI
10.11477/mf.1416200846
出版者・発行元
Igaku-Shoin Ltd

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.

リンク情報
DOI
https://doi.org/10.11477/mf.1416200846
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28819078

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