打哈欠,是人们在疲倦欲睡的时候经常发生的一种正常生理现象,不足为怪。但是,如果出现频繁打哈欠,那就是一种病态反应,应引起特别警惕。尤其是老年人,往往预示着脑血管意外(称“中风”)在近期内可能发作。调查发现,有80%左右的患者,在中风发作前5～10天内均有频繁打哈欠的现象。 It is no surprise that yawning is a normal physiological phenomenon that people often experience when they are tired and sleepy. However, if there is frequent yawning, that is a morbid reaction that deserves special vigilance. Elderly people, in particular, often indicate that cerebrovascular accidents (called “stroke”) may occur in the near future. The survey found that about 80% of patients, have frequent yawning phenomenon within 5 to 10 days before the onset of stroke.