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タイトル: | Deficit of state-dependent risk attitude modulation in gambling disorder |
著者: | Fujimoto, A Tsurumi, K https://orcid.org/0000-0001-5051-6978 (unconfirmed) Kawada, R Murao, T Takeuchi, H Murai, T Takahashi, H |
著者名の別形: | 藤本, 淳 鶴身, 孝介 高橋, 英彦 |
発行日: | 4-Apr-2017 |
出版者: | Springer Nature |
誌名: | Translational Psychiatry |
巻: | 7 |
論文番号: | e1085 |
抄録: | Gambling disorder (GD) is often considered as a problem of trait-like risk preference. However, the symptoms of GD cannot be fully understood by this trait view. In the present study, we hypothesized that GD patients also had problem with a flexible control of risk attitude (state-dependent strategy optimization), and aimed to investigate the mechanisms underlying abnormal risk-taking of GD. To address this issue, we tested GD patients without comorbidity (GD group: n=21) and age-matched healthy control participants (HC group: n=29) in a multi-step gambling task, in which participants needed to clear ‘block quota’ (required units to clear a block, 1000–7000 units) in 20 choices, and conducted a task-functional magnetic resonance imaging (fMRI) experiment. Behavioral analysis indeed revealed a less flexible risk-attitude change in the GD group; the GD group failed to avoid risky choice in a specific quota range (low-quota condition), in which risky strategy was not optimal to solve the quota. Accordingly, fMRI analysis highlighted diminished functioning of the dorsolateral prefrontal cortex (dlPFC), which has been heavily implicated in cognitive flexibility. To our knowledge, the present study provided the first empirical evidence of a deficit of state-dependent strategy optimization in GD. Focusing on flexible control of risk attitude under quota may contribute to a better understanding of the psychopathology of GDs. |
記述: | ギャンブル依存症の神経メカニズム --前頭葉の一部の活動や結合の低下でリスクの取り方の柔軟性に障害--. 京都大学プレスリリース. 2017-04-05. |
著作権等: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
URI: | http://hdl.handle.net/2433/219429 |
DOI(出版社版): | 10.1038/tp.2017.55 |
PubMed ID: | 28375207 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2017-04-05-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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