手機燈光如何影響你的大腦及身體

[转载]【智能手机灯光如何影响你的大脑及身体】

HOW SMARTPHONE LIGHT AFFECTS YOUR BRAIN & BODY (INFOGRAPHIC)
智能手機燈光如何影響你的大腦及身體

你可能不知道這一點,您的智能手機會發出明亮的藍光,它允許你在屏幕閱讀甚至在一天中的最亮的時候。但屏幕燈光並沒有關閉只是調整亮度根據每天的時間; 它連續地發射的,而不是僅由我們的智能電話,以及我們的筆記本電腦,電視和其他設備,也是這樣通過的。問題是,這樣說來,它模仿太陽的亮度,混淆你的大腦誤以為它是白天,即使是在夜深人靜的時候。這反過來會阻止褪黑激素的釋放,誘導睡眠激素你的大腦,並阻止你睡著。這就是為什麼專家建議至少睡覺前兩小時關閉所有屏幕。

褪黑激素是由大腦一個名為松果體的微小器官在睡覺前幾個小時分泌, 為什麼藍光科學通過移動設備發出讓人保持清醒,導致了所謂的感光黑視素的發現。雖然我們早已熟悉構建我們的願景的各種錐和棒,黑視蛋白在視網膜神經節細胞,這是對藍光敏感最近發現。從那時起,實驗研究發現,睡前使用移動設備,一般人可能難以躺下/或保持睡眠。

藍光的影響更顯著在青少年,比成人更容易受到光的影響。這是因為晝夜節律在青春期自然轉移,導致青少年到深夜感到更清醒。睡前啟動了一個視頻遊戲或電視節目可能足以晚睡一兩個鐘頭,使得清晨起床特別困難。

You might not know this, but your smartphone emits a bright blue light which allows you to read what’s on the screen even during the brightest points of the day. ​​But the light doesn’t turn off or adjust according to the hour of the day; it’s continually emitted, not only by our smartphones, but by our laptops, televisions, and other devices as well. The problem is that this light, which mimics the brightness of the sun, confuses your brain into thinking it’s daytime, even during the dead of night. This in turn stops your brain from releasing melatonin, the hormone which induces sleep, and prevents you from falling asleep. This is why experts recommend to turn off all screens at least two hours before bed.

Melatonin is released by a tiny organ in your brain called the pineal gland a couple of hours prior to sleep. The science of why the blue light emitted by mobile devices keeps people awake has led to the discovery of a photoreceptor called Melanopsin. Though we’ ve long been familiar with the various cones and rods that construct our vision, Melanopsin was discovered recently in retinal ganglion cells, which are sensitive to blue light. Since then, experimental research has found that the average person using mobile devices before bed may have difficulty falling and/or staying asleep.

The impact of blue light is even more significant for teenagers, who are more vulnerable to the effects of light than adults. This is because circadian rhythm naturally shifts during adolescence, causing teenagers to feel more awake late into the night. Starting up a video game or television show just before bedtime could be enough to push sleepiness away for another hour or two, making early mornings particularly difficult.

Blue Light Isn’t The Only Concern

Dr. Martin Blank from the Department of Physiology and Cellular Biophysics at Colombia University has joined a group of scientists from around the world who are making an international appeal to the United Nations regarding the dangers associated with various electromagnetic emitting devices, like cellphones and WiFi.

There are multiple concerns with these devices, including their link to cancer. More concerning still is the fact that a child’s brain absorbs up to four times as much radiation as that of an adult, and children today are growing up with these devices in hand. You can read more details about this HERE.

Our love for our screens is in itself a problem. In China, screen addiction is actually considered a clinical disorder, and as a result a number of rehabilitation centres have been established where young people addicted to screens are completely isolated from all media. Although the success of these treatment centres has yet to be established, their necessity paints a dark picture of the technological age in which we live. (source)

What You Can Do

The first thing you can do is limit your screen time before bed, turning all screens off at least two hours before you plan to fall asleep. This is the perfect time to catch up on your reading.

You can also download an app called f.lux, which adjusts the colour of your computer’s display to the time of day — warm at night and brighter during the day — and cuts the blue light being emitted. There are similar apps for phones as well . All of us here at CE use these apps and have really noticed an improvement in our sleep quality.

HERE is a page from their website that provides more research into what staring at screens can do to your sleep, as well as the science behind the f.lux app.

Regardless of whether you are worried about your sleep, we can all benefit from a daily break from our smartphones and other screens.

智能手機燈光如何影響你的大腦及身體

智能手机灯光如何影响你的大脑及身体

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