Objective: To analyze the changes of glucose metabolism in human brain caused by sweet taste stimulationwith positron emission tomography (PET) and statistical parametric mapping (SPM) software, then locate the sweet tastecentrum in human brain.

• 目的:应用正电子发射断层扫描(PET)成像,用统计参数图(SPM)软件包分析单一甜味觉刺激前后人脑部葡萄糖代谢的变化,对人脑皮层的甜味觉中枢进行定位。