Spontaneous alpha peak frequency predicts working memory performance across the age span
Spontaneous alpha peak frequency predicts working memory performance across the age span
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DOI：
10.1016/j.ijpsycho.2003.12.011
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发表时间：
2004-06-01
影响因子：
3
通讯作者：
Gordon, E
中科院分区：
文献类型：
--
作者：
Clark, CR;Veltmeyer, MD;Gordon, E
工作记忆能力一直被证明随着年龄的增长而下降。对这种下降的机制知之甚少。已经发现预测记忆测试表现的一个指标是阿尔法峰频率，EEG的光谱阿尔法功率的峰值。阿尔法波段的活动也与更高的认知功能有关，包括注意力和预期，并已被证明随着年龄的增长而减缓。研究很少。然而，已经研究了WM下降和α峰频率之间是否可能存在关系。本研究专门研究了这种关系。以数字广度作为WM功能的指标。该研究使用了脑资源国际数据库中年龄在11岁至70岁之间的550名正常受试者。数据来自美国（2）、欧洲（2）和澳大利亚（2）的6个实验室。正向和反向数字跨度被发现是较低的老年人相对于年轻的年龄组。自发α峰频率随年龄增长而减慢，前部比后部更明显。额叶α峰频率被认为是一个显着的预测反向数字广度，与每1赫兹的频率增加与反向数字广度分数增加0.21，这是独立的年龄，表明α峰频率和工作记忆性能之间的正相关关系。(C)2003 Elsevier B.V.保留所有权利。
Working memory capacity has been consistently shown to decline with increasing age. Mechanisms underlying this decline are poorly understood. One index that has been found to predict performance on memory tests is alpha peak frequency, the peak of spectral alpha power of the EEG. Activity in the alpha band has been also associated with higher cognitive functions including attention and anticipation and has been shown to slow with age. Few studies. however, have examined whether there might be a relationship between WM decline and alpha peak frequency The present study specifically investigated this relationship. Digit span was used as the index of WM function. The study made use of 550 normal subjects aged between 11 and 70 years in the Brain Resource International Database. The data were acquired from six laboratories located in the USA (2), Europe (2) and Australia (2). Forward and reverse digit span were found to be lower in older relative to younger age groups. Spontaneous alpha peak frequency slowed with age and more so at anterior than posterior sites. Frontal alpha peak frequency was found to be a significant predictor of reverse digit span, with each 1 Hz increase in frequency associated with a 0.21 increase in reverse digit span score and this was independent of age, indicating a positive relationship between alpha peak frequency and working memory performance. (C) 2003 Elsevier B.V. All rights reserved.