荷蘭研究人員發(fā)現(xiàn)，人的記憶力會(huì)受到深度睡眠時(shí)間長短的影響,。如果沒有沉睡期或者沉睡期過短,，人對此前學(xué)習(xí)內(nèi)容的記憶會(huì)比正常睡眠時(shí)差得多。
荷蘭神經(jīng)科學(xué)研究所的伊斯布蘭德·范德韋夫及同事在《自然—神經(jīng)學(xué)》（Nature Neuroscience）雜志發(fā)表報(bào)告說,，這是由于腦內(nèi)海馬體結(jié)構(gòu)的活動(dòng)過少,，而海馬體結(jié)構(gòu)承擔(dān)著強(qiáng)化記憶的功能，即把信息從短期記憶轉(zhuǎn)變成長期記憶,。
不過,，研究人員還無法說明海馬體結(jié)構(gòu)為什么會(huì)在缺乏沉睡時(shí)有這種反應(yīng),。
范德韋夫和同事挑選了13名年齡在52歲至68歲之間身體健康的女性作為研究對象，讓她們在睡前看一些圖片,，并對其中一半人的睡眠進(jìn)行監(jiān)測,。當(dāng)腦電波顯示已進(jìn)入沉睡時(shí)則發(fā)出一聲輕微的嘀聲，音量的大小足以對沉睡者造成干擾,，但又不能將其吵醒,。
第二天，接受測試者會(huì)繼續(xù)看一些圖片,，并指出其中是否有昨天看過的圖片,。在學(xué)習(xí)和回憶的過程中，研究人員會(huì)記錄測試者的大腦活躍程度,。結(jié)果顯示,，雖然兩組測試者睡了同樣長的時(shí)間，但缺乏沉睡顯然對記憶力造成了影響,。（生物谷Bioon.com）
生物谷推薦原始出處：
Nature Neuroscience Published online: 18 January 2009 | doi:10.1038/nn.2253
Sleep benefits subsequent hippocampal functioning
Ysbrand D Van Der Werf1,2, Ellemarije Altena1,3, Menno M Schoonheim4, Ernesto J Sanz-Arigita1,4, José C Vis1, Wim De Rijke2 & Eus J W Van Someren1,2
Sleep before learning benefits memory encoding through unknown mechanisms. We found that even a mild sleep disruption that suppressed slow-wave activity and induced shallow sleep, but did not reduce total sleep time, was sufficient to affect subsequent successful encoding-related hippocampal activation and memory performance in healthy human subjects. Implicit learning was not affected. Our results suggest that the hippocampus is particularly sensitive to shallow, but intact, sleep.
1 Department of Sleep and Cognition, Netherlands Institute for Neuroscience, an institute of the Royal Netherlands Academy of Arts and Sciences, Meibergdreef 47, 1105BA Amsterdam, The Netherlands.
2 Departments of Clinical Neurophysiology, Vrije Universiteit Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands.
3 Neurology, Vrije Universiteit Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands.
4 Radiology, Vrije Universiteit Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands.
