| Project/Area Number |
15K12353
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Eating habits
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| Research Institution | Osaka University |
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Principal Investigator |
Inui Tadashi 大阪大学, 人間科学研究科, 助教 (40324735)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 食 / 嗜好 / 行動 / 食嗜好 / 学習 / 行動学的実験 |
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| Outline of Final Research Achievements |
Palatability of foods, which has reward value, easily induce overeating in humans. It is assumed that there are central nervous systems involved in the palatability of foods. The present study aimed to establish a behavioral experimental paradigm and elucidate the neural mechanisms of the palatability of foods. Juvenile Wistar rats were presented wth sunflower seeds for 10 min. The consumed volume (g) and eating duration (sec) showed daily increase, indicating the palatability of the sunflower seeds gradually elevated. We also evaluated the opening of the eyes during the feeding and found that the rats tend to close their eyes during eating the sunflower seeds, but not normal chow, with time- and day-dependent changes. These results suggest that the volume and duration of eating the sunflower seeds are negatively correlated with the opening of the rat's eyes. Therefore, the present study revealed that using a sunflower seed and measuring eye opening are useful experimental paradigms.
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