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起床困难、有起床气的人,可能并不是由于懒惰,而是有某种潜在疾病的征兆,并且更有可能是一种心理疾病。
\n\n在心理学家看来,从睡眠中醒来后,出现暂时性的昏昏沉沉、不够或无法清醒的状态,其实是睡眠惰性使然。
\n\n有研究发现,人的认知功能在日常起床前后最差,睡眠惰性使然,人起床后,大脑迟钝,记忆、反应速度、警觉性、注意力等都比较弱,就会做一些明知道不该做的事[3]。
\n\n究竟为什么会产生睡眠惰性?有人认为,大脑各个部位进入清醒状态,是有一定的顺序的,一般而言,负责思考、处理高级任务的脑部区域,清醒得比较慢。
\n\n还有一种解释是,有可能是被叫醒的时机不对。人的睡眠大致分为这几个阶段:第一阶段、第二阶段、慢波睡眠、快速眼动睡眠。处于慢波睡眠阶段时,大脑中释放了大量的腺苷,这种化学物质会让人昏睡,如果此时被叫醒,人最有可能迷迷糊糊、似醒非醒。
\n\n有专家指出,休息了一夜的身体,在早晨 7、8 点钟醒来后按理说应该充满精神和活力。
\n\n但如果你睡得晚,或没睡好,人体激素水平、血压可能会受到影响,不会达到峰值,此时体内的多巴胺也难以得到释放,于是人的交感神经系统也不再那么敏锐,早起就容易有起床气。
\n\n把你的晚睡和赖床往高大上了说,你可能有“社会时差”。这是医学上出现的一个新名词,是德国时间生物学家蒂尔·伦内伯格创造的,指的是体内生物钟与自己生活、工作作息之间的“时差”,如果你的体内生物钟,与工作、生活日程安排不匹配,就会出现社会时差。
\n\n假设你是一个朝九晚五的上班族,每天的作息是很规律的,早上 8 点起床,晚上 10 点准时上床睡觉。但突然某天或某几天需要你加班、熬通宵,于是你的生物节律被扰乱,但为了上班不迟到,你又不得不违背自己体内的生物钟,来满足社会时间的要求,最终不出意外,你肯定会一次又一次“无意识”地按掉闹钟……
\n\n身体自带的生物钟和社会时间差距越大,说明你的社会时差越严重,可产生时差症状——闹钟一响,万般无奈,实在是不想起,或者起来后产生像有时差一样的疲倦感,迷迷瞪瞪、精神不振,消极怠工、效率低下,情绪不良……
\n\n正常人醒来后,可能上演几分钟的起床气,咬咬牙就会马上起来。但睡眠不好、长期失眠,或者身心有问题的人,身体和大脑觉醒得不像正常人那样快,如果被打扰,很容易情绪大爆炸。
\n\n2017 年的冬季,重庆一 14 岁男孩小勇,在睡得正香时,母亲将他叫醒,并掀开他温暖的被子,结果小勇面露不悦,情绪反常,大发雷霆,随后从 12 楼阳台跳了下去!!
\n\n(图片来源于网络)
\n\n像小勇这种情况的人,生活中有很多,由于正常量的睡眠无法得到满足,就会发生睡眠剥夺。睡眠作为人的基本生理需要,却无法得到保障时,情绪状态的波动就不可避免[4]。
\n\n一般认为,情绪与下丘脑的功能活动有关,有研究表明,睡眠被剥夺过程中,人的丘脑处糖代谢水平显著降低,糖代谢的下降,反映了脑功能活动水平的降低,人的脑力工作能力下降,会出现反应时间延长、警戒性降低、注意力受损等。
\n\n同时,睡眠剥夺也可导致心理认知功能的下降,出现心理功能的倒退现象,如思维混乱、注意力范围缩窄、操作失误增加等[5]。
\n\n此外,小勇出现这种情绪,可能还与躯体感觉相关。一般而言,适宜的、温和的刺激,常产生良好的情绪,而强烈的、痛苦的刺激,往往导致恶劣的情绪。当母亲把被子掀开的那一刻,寒意飕飕,再加上没睡够,双重的痛苦感觉,无疑会将恶劣的情绪扩大化,让他做出不理智的行为。
\n\n说到这里,问题来了,起床气伤人、伤心还误事儿,尤其是冬季的起床气,似乎杀伤力更强,那有什么快速清醒的方法吗?
\n\n另外注意,养成良好的睡眠习惯,每天尽量在同一时间上床睡觉和起床,找到自己的睡眠节律,合理安排学习、工作与休息,不要给自己太大的压力。如果感觉压力山大,要寻找压力的来源,及时排解压力,减轻精神负担。
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