嗅觉是人体的重要生理功能之一,具有辨别气味、增进食欲、识别环境及报警等作用,还可通过中枢神经系统影响人的情绪、调节生命周期。嗅觉的形成较为复杂,除嗅神经外,还有三叉神经、舌咽神经、迷走神经的参与,并受社会、生理、心理诸多因素的影响。迄今为止,国际上对嗅觉功能检 Smell is one of the important physiological functions of human body. It has the functions of distinguishing odor, increasing appetite, identifying environment, alarming and so on. It can also affect people’s mood through the central nervous system and regulate the life cycle. The formation of the olfactory complex, in addition to olfactory nerve, but also the trigeminal nerve, glossopharyngeal nerve, vagus nerve involvement, and social, physical, psychological and many other factors. So far, the international test of olfactory function