\n\n
有些人真的会被床锁住!!
\n\n他们刚刚睡着或从梦中醒来,意识处于清楚状态,可无论怎么挣扎,身体就像石头一样不能动弹,话也说不出来,甚至连眼睛都睁不开、气也喘不上。此时他们只想大呼(根本喊不出来)——
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\n\n\n\n什么鬼压床?世上真有鬼?
\n\n全世界的任何文明里都有鬼的身影。各种各样的鬼,承载了人们对未知的憧憬或恐惧。而“鬼压床”也是文化与生理学共同铸就的一个词汇。
\n\n而在医学上,它实际被称为睡眠瘫痪症(sleep paralysis)。
\n\n先说文化,鬼可不是中国人的专利,鬼压床也不是。不同文化对鬼压床也有着各式各样的记载。
\n\n一本题为《Sleep Paralysis: Night-Mares, Nocebos, and the Mind-Body Connection》(睡眠瘫痪:梦魇、让人不适的药物和身心联系)的书里写到,在每一个有文字记载的文明中,都记录下了这种“想醒却醒不来,喘不上气,好像有人坐在自己胸口上”的噩梦体验。
\n\n比如英国,鬼压床就是守财精灵坐在睡梦者身上,数袋子里的便士;
\n\n在芬兰,鬼压床是因为屋中老人坐在了睡梦者的胸口;
\n\n在意大利文化中,鬼压床是邪恶的女巫在袭击你;
\n\n在东南亚文化中,鬼压床是去世亲人的呼唤;
\n\n在美国近代文化中,有人将鬼压床描述成被外星人绑架……
\n\n接下来谈生理方面。我们应该先了解一件事,人的正常睡眠周期可分为非快速眼动阶段和快速眼动阶段。
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\n\n\n\n非快速眼动睡眠大致可分为 3 个阶段:
\n\n1.闭上了眼睛,但是很容易被叫醒。
\n\n2.轻度睡眠,心率和体温下降,并准备进入深度睡眠。
\n\n3.深度睡眠。
\n\n在入眠时,人先进入非快速眼动阶段,由浅入深,再由深到浅,然后进入快速眼动阶段,两者交替进行[1]。一般情况下,人会在非快速眼球运动的过程中醒来。
\n\n快速眼动阶段,顾名思义,眼球会呈现不自主的快速移动。此时,你的眼球会不停地左右摆动,而身体处于脑皮质活跃、骨骼肌瘫痪的状态[2],表现出心率加快、血压升高、肌肉松弛等情况。如果在这阶段醒来,就可能会出现睡眠瘫痪,也就是被“鬼压床”了!

\n\n\n\n“鬼压床”的感受由何而来?
\n\n“为什么意识有了,身体动不了?是灵魂附体被控制了么?”
\n\n并不是。
\n\n在快速眼动阶段,身体肌肉的运动神经元会被抑制[3],而人的脑电波和清醒时类似,甚至比清醒时还要活跃[4]。所以,当我们在这个阶段结束前提前醒来,身体的肌肉还处于沉睡的抑制状态,自然就出现了“意识已经清醒,身体还是无法动弹”的现象。
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\n\n“喘不过气,感觉什么人坐在我的胸口上……”
\n\n在快速眼动阶段,你本身就是处于呼吸变浅、呼吸频率增加、部分气道阻塞、缺氧等状态[5],就像是武侠小说里的“丹田聚气”,或是吹奏乐器的音乐家“气沉丹田”的呼吸状态。
\n\n当你此时突然醒来,就会觉得呼吸急促,或者有东西堵住自己胸口。
\n\n\n\n不要怕!睡眠瘫痪大多数时候对身体没啥威胁。但如果感觉身体某部位出奇地疼痛,及时就医是最好的选择。
\n\n哦,对了,《彼得·潘》(后被拍成电影《小飞侠》)的作者詹姆斯·马修·巴里也存在睡眠瘫痪,他正是把这种经历融合到了作品里,从而让文字中压抑的紧张感栩栩如生。

\n\n(图片来源:腾讯视频)
\n\n对于今天的我们来说,产生睡眠瘫痪的原因可能是压力过大、焦虑、抑郁、睡眠不足等。另外,睡眠呼吸暂停综合征和嗜睡症之类的睡眠障碍,也会导致睡眠瘫痪症[6]。
\n\n同时,仰卧位的睡姿更容易阻塞气道,从而增加睡眠瘫痪的风险[7]。
\n\n总之,养成良好的生活习惯、保证规律的作息,以及不滥用药物、及时释放压力,睡眠瘫痪症的发病率其实是很低的。如果存在严重睡眠障碍,建议到医院寻找医生的帮助。
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\n\n\n\n',image:a,ref:[],op_keyword:[],op_copyright:a,ref_info:["贾建平, 苏川. 神经病学(第九版)[M]. 北京:人民卫生出版社, 2018.","郭若一, 韩嫣. 快速眼动睡眠发生机制及相关疾病研究进展[J]. 国际神经病学神经外科学杂志, 2016(6).","Brooks P L , Peever J H . Identification of the Transmitter and Receptor Mechanisms Responsible for REM Sleep Paralysis[J]. Journal of Neuroscience, 2012, 32(29):9785-9795.","Steriade M M, McCarley R W. Brainstem control of wakefulness and sleep[M]. Springer Science & Business Media, 2013.","Cheyne J A . Sleep Paralysis and the Structure of Waking-Nightmare Hallucinations[J]. Dreaming, 2003, 13(3):163-179.","“Sleep Paralysis”, https://www.webmd.com/sleep-disorders/sleep-paralysis#2.","Cheyne J A . Situational factors affecting sleep paralysis and associated hallucinations: position and timing effects[J]. 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