还是人的翻译比机器的翻译好一点儿吧(性医学科普内容,不喜勿入)

来源: riverside 2013-09-06 15:02:17 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 次 (3920 bytes)
Hi Alice,
Why is it when guys wake up they have an erection in the morning? Does this happen to ALL guys? Thanks.

Dear Reader,

Contrary to what many believe, waking up with your flag at full mast is not caused by urine buildup in the bladder. Morning erections are technically nighttime erections (or Nocturnal Penile Tumescence) which happen three to five times per night. They usually pop up (pun intended) during periods of Rapid Eye Movement (REM) sleep (when most dreaming occurs) and last around 30 minutes each. Unrelated to dream content, they are both common and completely normal and men older than sixty years may even have them during non-REM sleep.

Likely a combination of testosterone levels and bedtime brain activity, these spontaneous woodies in the wee hours are caused by specific neuroreflexes that are stimulated during REM sleep. Scientists believe that the nerves in the penis release nitrous oxide which dilates nearby blood vessels, increasing blood flow and leading to an erection. Though you may find it surprising, this phenomenon occurs in other mammals. Women experience similar yet less visually noticeable REM-related engorgement of the clitoris and vagina as well.

Thought to be the body's natural attempt to properly oxygenate the penile tissue, most guys will have nocturnal erections throughout their lifetime, and their frequency, along with one's awareness of them, may vary. The penis may stay erect for up to two hours nightly, and not all men who have erections during the night wake up with one in the morning. So despite the name, the common experience of "morning wood" has nothing to do with time of day, but rather the flag raiser's stage of sleep.
(http://goaskalice.columbia.edu/whats-morning-erections)



(河边同学的中文翻译,现个丑)
爱丽丝,您好,
为什么男性早晨醒来会有清晨勃起?所有的男性都有这种现象吗?谢谢。

亲爱的读者,

跟很多人所相信的不一样的是,清晨你的旗杆高高竖起不是因为尿憋的。严格地说清晨勃起应该叫做夜间勃起(或夜间阴茎勃起)更恰当,这种现象通常一夜会发生三到五次。旗杆在睡眠的每次快速眼动期(REM),也就是做梦最多的那个期,会竖起并持续竖起三十分钟。这种竖旗非常常见,而且是完全正常的。甚至六十岁以上的男性都可能在睡眠的非快速动眼出现。

夜间的这种自发勃起是在快速动眼睡眠期受到激动的神经反射引起的,很可能是睾丸酮水平和夜间脑活动共同起了作用。科学家们相信,阴茎里的神经释放了一氧化氮,从而引起了附近血管的舒张,进而增加了阴茎的血流而导致勃起。这种清晨勃起现象也在其它哺乳类中发生,也许你会觉得吃惊。女性也有类似的,但是不易看到的快速动眼期相关的阴蒂和阴道充血。

夜间勃起现象被认为是机体为阴茎组织充分供氧的自然机制。大多数男性会一直都有这种夜间勃起,只是其频度,以及是否自己能察觉到会有所不同。有可能阴茎在夜间会勃起两个小时之多,但是不是所有有夜间勃起的男性在早晨醒来是也有勃起。所以,尽管很多人把它称为“晨勃”,常见的那种“早晨硬梆梆”的经验其实跟那个“早晨”本身没什么关系,而是跟“举旗者”的夜间睡眠期有关。



(Google自动翻译,供大家一笑)
你好,爱丽丝,
为什么当你们醒来,他们在早晨有勃起呢?这是否发生在所有的球员吗?谢谢。

亲爱的读者,

相反许多人认为,醒来你的旗帜肥大饱满尿液积聚在膀胱引起的。清晨勃起是技术上夜间勃起(或夜间阴茎勃起)每晚发生的三到五倍。他们通常会弹出(双关语意)期间的快速眼动(REM)睡眠(最做梦时),历时约30分钟。梦的内容无关,他们都是共同的,完全正常,男性年龄超过60岁,甚至可能有他们在非REM睡眠。

可能相结合的睾丸激素水平和睡前大脑的活动,这些自发伍迪在凌晨由的具体neuroreflexes,在REM睡眠刺激引起的。科学家认为,神经附近扩张血管,增加血流量,导致勃起的阴茎释放的一氧化二氮。虽然你可能觉得奇怪,这种现象发生在其他哺乳动物。妇女遇到类似的还少明显的视觉REM期相关怒张阴蒂和阴道。

思想是身体的自然尝试适当充氧阴茎组织,大部分男生将其整个一生中有夜间勃起,和他们的频率,随着一个人的意识,可能会有所不同。阴茎可能保持直立长达两个小时的夜间,在夜间勃起并非所有的人在早上醒来。因此,尽管这个名字,共同体验“早上木”做一天的时间无关,而是标志专业户的睡眠阶段。
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