季節(jié)性流感病毒H1亞型核酸檢測試劑盒

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【公司名稱】 廣州健侖生物科技有限公司
【市場部】    楊永漢

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【公司地址】 廣州清華科技園創(chuàng)新基地番禺石樓鎮(zhèn)創(chuàng)啟路63號二期2幢101-103室

美國紐約大學醫(yī)學院和中國北京大學深圳研究生院的研究人員在小鼠的一項研究中表明，睡眠可鞏固記憶，而它是通過促進腦中新的突觸的生長來做得這一點的。相關文章發(fā)表于2014年6月6日的《science》雜志上。
科學家們長期以來就知道，睡眠可幫助增進學習及記憶，盡管這一過程是如何發(fā)揮作用的則一直晦暗不明，尤其是當睡眠被顯示會減少腦中的突觸數(shù)或神經(jīng)連接時。(尋找睡眠與記憶之間有某種的研究人員會期待看到睡眠時突觸數(shù)會有所增加。)
Guang Yang及其同事zui近在該領域中取得了進展;他們證明，教小鼠學習一種新的運動技能——如在某根桿子頂部保持平衡——會引起它們腦中新的樹突棘的形成(樹突棘的數(shù)目與神經(jīng)突觸數(shù)是相關的)。這提示，在哺乳類動物腦中的突觸變化是學習的基礎。
如今，為了探索睡眠是否會影響突觸變化，Yang等人用一種技術來觀看活體小鼠運動皮層中的樹突棘。他們訓練小鼠學習不同的技能。有些小鼠可在學習后馬上得到睡眠;另外一些小鼠則要經(jīng)歷一段8小時的睡眠剝奪時間。睡眠可引起新樹突棘數(shù)的增加。剝奪睡眠則適得其反。實際上，睡眠剝奪的影響是如此之強，它能壓制額外訓練的效果;即使當睡眠剝奪小鼠得到對某技能的更嚴格的訓練，但它們?nèi)匀槐饶切┑玫叫菹⒌膶Φ刃∈笏L出的新突觸棘要少。

Researchers at the New York University School of Medicine in the United States and the Shenzhen Graduate School of Peking University in China have shown in a study of mice that sleep can consolidate memory by doing this by promoting the growth of new synapses in the brain. A related article was published in "science" magazine on June 6, 2014.
Scientists have long known that sleep helps to improve learning and memory, though the process of how it works has been obscure, especially when sleep is shown to reduce the number of synapses or neural connections in the brain. (Researchers looking for a connection between sleep and memory expect to see an increase in the number of synapses when they sleep.)
Guang Yang and colleagues recently made progress in the field; they demonstrated that teaching mice to learn a new motor skill - such as balancing on the top of a pole - can cause new dendrites in their brains (The number of dendritic spines is related to the number of synapses). This suggests that synaptic changes in the mammalian brain are the foundations of learning.
Now, to explore whether sleep affects synaptic changes, Yang et al. Used a technique to see dendritic spines in the motor cortex of living mice. They train mice to learn different skills. Some mice sleep immediay after they learn; others have an 8-hour sleep deprivation period. Sleep can cause an increase in the number of new dendrites. Deprivation of sleep is counterproductive. In fact, the effect of sleep deprivation is so strong that it can suppress the effects of additional training; even when sleep-deprived mice receive more rigorous training in a particular skill, they are still more likely than their peers who are rescued The new synaptic out less.