Visual food stimulus changes resting oscillatory brain activities related to appetitive motive.
Visual food stimulus changes resting oscillatory brain activities related to appetitive motive.
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DOI：
10.1186/s12993-016-0110-3
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发表时间：
2016-09-26
期刊：
影响因子：
--
通讯作者：
Watanabe Y
中科院分区：
文献类型：
--
作者：
Yoshikawa T;Tanaka M;Ishii A;Yamano Y;Watanabe Y
视觉食物刺激后静息态脑活动的变化可能会影响日常生活中进食的愉悦感和自发食欲动机。我们使用脑磁图（MEG）来识别与活动变化相关的脑区。入组了15名健康右利手男性[年龄，25.4 ± 5.5岁;体重指数，22.5 ± 2.7 kg/m2（平均值± SD）]。被试被要求观看食物或马赛克图片5 min，并在图片呈现前后闭上眼睛3 min，不思考任何事情。在两次闭眼期间记录了休息时的大脑活动。通过视觉模拟量表（VAS）评分评估日常生活中进食的愉悦感和研究环境中的食欲动机。食物图片呈现后，右侧额叶Brodmann区（BA）13、左侧眶额皮质（OFC）（BA 11）和左侧额极（BA 10）的静息振荡脑活动的γ-带功率降低。在背外侧前额叶皮层（DLPFC）中观察到α波段功率显著降低（BA 46）。特别是，在吃食物的快乐的感觉是正相关的功率下降的前额叶皮层和负相关的DLPFC。食欲动机的变化与额极的功率下降有关。这些研究结果表明，自动脑力学，其中休息的大脑活动的变化可能与饮食生活中的积极感觉，并通过情感和认知的大脑功能对不可抗拒的食欲动机的影响。
Changes of resting brain activities after visual food stimulation might affect the feeling of pleasure in eating food in daily life and spontaneous appetitive motives. We used magnetoencephalography (MEG) to identify brain areas related to the activity changes. Fifteen healthy, right-handed males [age, 25.4 ± 5.5 years; body mass index, 22.5 ± 2.7 kg/m2 (mean ± SD)] were enrolled. They were asked to watch food or mosaic pictures for 5 min and to close their eyes for 3 min before and after the picture presentation without thinking of anything. Resting brain activities were recorded during two eye-closed sessions. The feeling of pleasure in eating food in daily life and appetitive motives in the study setting were assessed by visual analogue scale (VAS) scores. The γ-band power of resting oscillatory brain activities was decreased after the food picture presentation in the right insula [Brodmann’s area (BA) 13], the left orbitofrontal cortex (OFC) (BA11), and the left frontal pole (BA10). Significant reductions of the α-band power were observed in the dorsolateral prefrontal cortex (DLPFC) (BA46). Particularly, the feeling of pleasure in eating food was positively correlated with the power decrease in the insula and negatively with that in the DLPFC. The changes in appetitive motives were associated with the power decrease in the frontal pole. These findings suggest automatic brain mechanics whereby changes of the resting brain activity might be associated with positive feeling in dietary life and have an impact on the irresistible appetitive motives through emotional and cognitive brain functions.
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