目前,在一些农村,仍然流传有“左眼跳福(财),右眼跳祸(灾)”的说法,意思是眼皮的跳动能预示来日的福祸吉凶。实际上,这是一种没有科学根据的无稽之谈。那么,人的眼皮为什么会跳动呢?大家知道,人的眼皮是很薄的,在眼皮下面还有一层很薄的椭圆形的肌肉,医学上叫做“眼轮匝肌”。当这块肌肉收缩或舒张时,眼皮就产生张开或闭合的动作。眼轮匝肌是受面部神经支配的,其中枢在大脑皮层,当外界异物进入眼睛时,受面部神经的指挥,上下眼皮就会自动闭合,这是人体的一种保护性的反应。但是,当眼轮匝肌过于疲劳,或面部神经过于兴奋,或眼睛受到某种 At present, in some rural areas, there is still a saying that the eyelid’s beating can predict the good and bad for the coming day’s blessings. In fact, this is a nonsense without scientific basis. So, why the human eyelid beating? We all know, people’s eyelids are very thin, there is a layer of thin oval muscle below the eyelids, medicine is called “orbicularis muscle.” When this muscle contracts or relaxes, the eyelids will open or close. Orbicularis oculi muscle is subject to facial nerve innervation in the cerebral cortex, when foreign bodies into the eyes, under the command of the facial nerve, upper and lower eyelids will automatically close, which is a protective reaction of the human body. However, when the orbicularis muscle is too tired or the facial nerve is over excited or the eye is subjected to some kind of