作　　者： ; ; ;

机构地区： 北京大学心理学系

出　　处： 《心理科学》 2006年第5期1153-1156,共4页

摘　　要： 该研究采用功能性核磁共振(fMRI)技术,考察了咀嚼口香糖时大脑的活动。结果发现,与休息相比,口香糖咀嚼显著增加了脑的BOLD(血氧依赖水平)信号;与口香糖咀嚼相关的脑区有初级运动皮层,右侧后顶叶,双侧小脑,以及双侧前额叶的部分区域。ROI(感兴趣区域)分析发现,咀嚼时不同脑区的对血氧含量有不同程度的提高,其中中央前回的血氧依赖水平信号变化量高达46.3%,说明口香糖咀嚼增强了某些脑区的活动,显著提高了这些脑区的血流和供氧水平。 We used the fMRI technique to explore the regional brain activities associated with gum chewing. A large number of subjects （n 60） were put into the fMRI .scanner and were asked to chew gum or have a rest in ahernation. Results showed that, compared with resting, gum chewing significantly increases the blood oxygenation level dependent （BOLD） signal in the brain. The activated brain regions include the primary motor cortex, right posterior parietal cortex, bilateral cerebellum, and .some regions in the prefrontal cortex. Different regions have different BOLD signal changes, with the largest change （46.3%） taking place at the precentral gyrus, indicating that gum chewing increases supply of oxygen to parts of the brain.

关 键 词： 咀嚼 口香糖 脑活动 功能性核磁共振成像 血氧含量 血氧依赖水平

领　　域： [哲学宗教]