\n\n
来源:爱德华·蒙克《呐喊》
\n\n好不容易快睡着了,身体突然像触电一样抖一下,或者突然有一种脚下踩空的感觉,不由自主地猛踢一下,然后瞬间被惊醒……
\n\n有人会煞有其事地告诉你,这是大脑不定时发送脉冲信号,想试试你是不是还活着。
\n\n其实,没那么玄乎。这是一种无意识的肌肉颤动,由于速度很快,常常表现出类似触电一样的动作,叫做临睡肌抽跃症。有数据表明,大约 70% 的人在睡梦中抖过[1]。
\n\n来源:giphy
\n\n这种现象婴儿更容易发生,看到宝宝稍微抽两次,不少家长就会吓一跳,以为孩子得了啥怪病,什么脑瘫、智力问题啊。实际上,这是因为孩子大脑发育尚未完全,抑制肌抽跃功能比较弱,也就更容易出现,不用大惊小怪。
\n\n人体出现临睡肌抽跃症,大多数情况下与过度劳累、工作压力大、大脑的神经处于紧绷状态有关,一般不会有什么大问题。
\n\n不过,也得警惕是否是症状性肌抽跃。如果在此期间,伴有头痛、头晕等状况,那就需要去医院检查,判断此种肌抽跃是不是由于脑部有病变而表现出来的症状。
\n\n所以说,只要不是睡觉蹦大迪,抖抖一般不会影响睡眠,翻个身,继续睡就好。
\n\n睡意沉沉的你突然意识清醒,像是灵魂出窍般,清楚地知道自己在睡着,但全身不能动弹,也无法张嘴说话,感觉身体被重物压着透不过气来,似醒非醒,民间俗称“鬼压床”。
\n\n来源:网络
\n\n在医学上,这被定义为睡眠瘫痪症,是指人虽然已经醒来了,但是身体以及大脑的一部分还处在睡眠中,在不听意识指挥的状态下的短暂瘫痪。
\n\n这事儿在很多人身上发生过,据美国一份研究报告表明,有 40%~50% 的人在一生中至少会经历一次睡眠瘫痪,只有 3%~6% 的人会反复出现这种状况[2]。
\n\n\n\n\n这种情况大多发生在入眠阶段的快速眼球运动期(人们在睡觉过程中,会交替进行眼球运动或非快速眼球运动),在快速眼球运动期,γ-氨基丁酸(GABA)和甘氨酸一类的神经递质(Glycine)会抑制身体肌肉的运动,
\n\n因此,在这个阶段结束前醒来,肌肉还处于沉睡的抑制状态,即便你的意识已经清醒,也是无法动弹的,有时还会伴有影像幻觉。
\n
因为医学上还没明确这类情况发生的病理基础,而且身体健康的人也有可能发生,发生后也并没有其他不适症状出现,所以也无需治疗。
\n\n和临睡肌抽跃症一样,睡眠瘫痪和过度疲劳、紧张焦虑、作息不规律、心理压力过大等有关。加拿大滑铁卢大学研究表明,仰卧时口腔内软腭下垂,阻塞呼吸通气,容易诱发睡眠瘫痪,所以最好侧着睡[3]。同时避免枕头过高,8~12cm 为宜。
\n\n月黑风高的夜晚,睡得很香,梦也很美,可突然传来一阵“咯吱咯吱”的声音,此起彼伏,侧耳倾听才发现是从枕边人嘴里传出来的“磨牙”声!
\n\n磨牙的现象在口腔医学里称为磨牙症,是指睡眠时会习惯性地磨牙,甚至在白天也有无意识磨牙的习惯。10% 的成人以及 15% 以上的儿童患有此病。
\n\n铁杵都能磨成针,牙齿磨久了那也不好说啊……
\n\n一般建议去正规口腔医院或诊所买一个牙垫,睡前戴上,能起到类似“安慰剂”的作用,让患者更加放松。
\n\n有一些小技巧也可以尝试:
\n\n午间小憩,一觉醒来却发现下巴上全是不知名液体,闻闻,还有点臭臭的味道!这不是熟悉的配方,自己的口水嘛。偷偷瞄一眼同事,为啥别人没流哈喇子呢?
\n\n来源:网络
\n\n正常情况下,人体每天大约会分泌 1.5 升的唾液到口腔中。在清醒状态时,我们可以主动咽下口水,所以一般不会出现口水流出嘴角的情况。
\n\n病态的流口水称为“流涎症”。严重的疾病是由于脑脊髓的、脑瘫的、面神经麻痹引起;但是对于正常成人来说,如果出现流口水的情况,大部分是三个原因:
\n\n睡觉姿势不对。睡觉时,嘴部肌肉是放松的。仰着睡,口水会聚集到口腔后方,引发吞咽动作,不会流出。但如果趴在桌子上睡或压着脸侧卧,就可能导致唾液从嘴角流出而不是被吞咽了。。
\n\n口腔卫生不佳。食物残渣或糖类物质会积存在牙缝里或牙面上,引起细菌繁殖,刺激唾液分泌。或是牙齿有畸形,前牙向前凸出得很明显,会出现张嘴睡觉的情况。感冒和过敏性鼻炎后出现的鼻塞,也会这样。
\n\n某些药物的刺激,如一些抗精神病类的药物和抗生素,已被证明会导致过度流口水。
\n\n据说,人的一生中平均有 229961 小时的睡眠时间,这看似漫长实则短暂的 26 年,是我们休养生息的宝贵时光。
\n\n抛开压力,带着轻松平和的心情入睡,这才是睡觉的“终极之道”。
\n\n今夜,祝君好眠。
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