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Title: Amygdala activation during unconscious visual processing of food
Authors: Sato, Wataru  KAKEN_id  orcid https://orcid.org/0000-0002-5335-1272 (unconfirmed)
Kochiyama, Takanori
Minemoto, Kazusa
Sawada, Reiko
Fushiki, Tohru
Author's alias: 佐藤, 弥
河内山, 隆紀
嶺本, 和沙
澤田, 玲子
伏木, 亨
Keywords: Amygdala
Obesity
Issue Date: 13-May-2019
Publisher: Springer Science and Business Media LLC
Journal title: Scientific Reports
Volume: 9
Thesis number: 7277
Abstract: Hedonic or emotional responses to food have important positive and negative effects on human life. Behavioral studies have shown that hedonic responses to food images are elicited rapidly, even in the absence of conscious awareness of food. Although a number of previous neuroimaging studies investigated neural activity during conscious processing of food images, the neural mechanisms underlying unconscious food processing remain unknown. To investigate this issue, we measured neural activity using functional magnetic resonance imaging while participants viewed food and mosaic images presented subliminally and supraliminally. Conjunction analyses revealed that the bilateral amygdala was more strongly activated in response to food images than to mosaic images under both subliminal and supraliminal conditions. Interaction analyses revealed that the broad bilateral posterior regions, peaking at the posterior fusiform gyrus, were particularly active when participants viewed food versus mosaic images under the supraliminal compared with the subliminal condition. Dynamic causal modeling analyses supported the model in which the subcortical visual pathway from the pulvinar to the amygdala was modulated by food under the subliminal condition; in contrast, the model in which both subcortical and cortical (connecting the primary visual cortex, fusiform gyrus, and the amygdala) visual pathways were modulated by food received the most support under the supraliminal condition. These results suggest the possibility that unconscious hedonic responses to food may exert an effect through amygdala activation via the subcortical visual pathway.
Description: 食物に無意識で感情を感じる脳内メカニズムを解明. 京都大学プレスリリース. 2019-05-22.
Rights: © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
URI: http://hdl.handle.net/2433/241586
DOI(Published Version): 10.1038/s41598-019-43733-2
PubMed ID: 31086241
Related Link: https://www.kyoto-u.ac.jp/ja/research-news/2019-05-22
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