EEG-alpha rhythms and memory processes
EEG-alpha rhythms and memory processes
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DOI：
10.1016/s0167-8760(97)00773-3
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发表时间：
1997-06-01
影响因子：
3
通讯作者：
Klimesch, W
中科院分区：
文献类型：
--
作者：
Klimesch, W
几个实验的结果表明，阿尔法频率作为记忆性能的函数而变化。结果发现，在年龄匹配的受试者样本中，记忆力好的人的α频率比记忆力差的人高出约1 Hz。表现好和表现差的人之间的α频率差异在信息检索期间达到最大值，在编码期间小得多，在resing期间最小，但仍然很重要。这些结果表明，阿尔法频率可能是一个永久的，而不仅仅是一个功能参数，决定了信息可以从记忆中检索的速度。频带功率的变化的计算进一步表明，上阿尔法带是特别敏感的语义记忆的需求。另一方面，较低的阿尔法带似乎反映了注意力过程。这些研究结果进行了讨论的基础上的假设，假设EEG频率的α波段干至少部分来自丘脑和丘脑-皮层网络的活动反映了相关的搜索，访问和检索信息（语义）的长期记忆的过程。(C)1997年Elsevier Science B.V.
The results of several experiments indicate that alpha frequency varies as a function of memory performance. It was found that in samples of age matched subjects alpha frequency of good memory performers is about 1 Hz higher than those of bad performers. The difference in alpha frequency between good and bad performers reaches a maximum during the retrieval of information, is much smaller during encoding and is minimal - but still significant - during a resing period. These results suggest that alpha frequency may be a permanent and not only a functional parameter that determines the speed with which information can be retrieved from memory. The calculation of changes in band power indicate further that the upper alpha band is particularly sensitive to semantic memory demands. The lower alpha band, on the other hand, seems to reflect attentional processes. These findings are discussed on the basis of a hypothesis which assumes that EEG frequencies within the alpha band stem at least in part from the thalamus and that the activity of thalamo-cortical networks reflects processes that are related to searching, accessing and retrieving information from (semantic) long-term memory. (C) 1997 Elsevier Science B.V.