Neural activity induced by visual food stimuli presented out of awareness: a preliminary magnetoencephalography study.
Neural activity induced by visual food stimuli presented out of awareness: a preliminary magnetoencephalography study.
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DOI：
10.1038/s41598-018-21383-0
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发表时间：
2018-02-15
影响因子：
4.6
通讯作者：
Yoshikawa T
中科院分区：
文献类型：
--
作者：
Takada K;Ishii A;Matsuo T;Nakamura C;Uji M;Yoshikawa T
肥胖是现代社会的一个主要公共卫生问题。食欲行为被认为部分是由无意识的决策过程驱动的，因此，针对与饮食行为相关的无意识认知过程对于制定超重个体和肥胖患者的策略至关重要。在这里，我们向健康的男性志愿者展示了低于意识阈值的食物图片，并使用脑磁图检查了与食欲行为相关的神经活动。我们发现，在实验过程中不认识食物图片的参与者中，心电图评估的心率变异性指数（低频分量功率/高频分量功率比，LF/HF）在图片呈现后比呈现前增加，LF/HF的增加与食物摄入的认知抑制评分呈负相关。此外，LF/HF的增加与Brodmann区（BA）47中由低于意识阈值的食物图片引起的α波段功率增加呈负相关，而认知抑制水平与BA 13中α波段功率增加呈正相关。我们的研究结果可能为评估食欲无意识调节的方法的发展提供有价值的线索，并为进一步研究与进食行为相关的神经机制提供途径。
Obesity is a major public health problem in modern society. Appetitive behavior has been proposed to be partially driven by unconscious decision-making processes and thus, targeting the unconscious cognitive processes related to eating behavior is essential to develop strategies for overweight individuals and obese patients. Here, we presented food pictures below the threshold of awareness to healthy male volunteers and examined neural activity related to appetitive behavior using magnetoencephalography. We found that, among participants who did not recognize food pictures during the experiment, an index of heart rate variability assessed by electrocardiography (low-frequency component power/high-frequency component power ratio, LF/HF) just after picture presentation was increased compared with that just before presentation, and the increase in LF/HF was negatively associated with the score for cognitive restraint of food intake. In addition, increased LF/HF was negatively associated with increased alpha band power in Brodmann area (BA) 47 caused by food pictures presented below the threshold of awareness, and level of cognitive restraint was positively associated with increased alpha band power in BA13. Our findings may provide valuable clues to the development of methods assessing unconscious regulation of appetite and offer avenues for further study of the neural mechanisms related to eating behavior.
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DOI：
10.1073/pnas.96.14.8301
发表时间：
1999-07-06
影响因子：
11.1
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