Frontal midline theta and cross-frequency coupling during short term memory and resting state

Q4 Neuroscience
András Puszta
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引用次数: 0

Abstract

This paper aims to establish how frontal midline theta and theta-gamma coupling are altered by memory load as well as by recall performance during a verbal digit span task using an open EEG dataset. Traditional behavioral scores, as well as new measure were used, as the recall accuracy as a function of the order of the digits followed a sigmoid curve. The new behavioral score was strongly correlated with traditional measures. The EEG results show that neither the resting state theta nor the theta during the digit span task is predictive of the task performance. However, there was a strong positive correlation between cognitive load and theta power as well as a negative correlation between cognitive load and theta peak frequency during the task. These results are in line with earlier studies indicating that frontal midline theta is modulated by cognitive load rather than memory performance. Furthermore, there was an increased alpha-beta cross frequency coupling during resting state but that was not correlated with the performance of the upcoming memory task. During the task the cross-frequency coupling was minimal, and it did not correlate with memory performance nor with task load, that raises the possibility that EEG is not sensitive enough for cross-frequency coupling measures.

短期记忆和静息状态时额中线θ波和交叉频率耦合
本文旨在利用开放的脑电图数据集,确定在口头数字广度任务中,记忆负荷和回忆性能如何改变额叶中线θ和θ - γ耦合。传统的行为评分和新的测量方法都被使用,因为回忆的准确性作为数字顺序的函数遵循一个s型曲线。新的行为评分与传统的测量方法密切相关。脑电图结果表明,静息状态和数字跨度任务时的θ都不能预测任务的表现。认知负荷与θ波功率呈显著正相关,而认知负荷与θ波峰值频率呈显著负相关。这些结果与早期的研究一致,表明额叶中线θ是由认知负荷而不是记忆表现调节的。此外,在静息状态下,α - β交叉频率耦合增加,但这与即将到来的记忆任务的表现无关。在任务期间,交叉频率耦合最小,并且与记忆性能和任务负载无关,这提出了脑电图对交叉频率耦合测量不够敏感的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Neuroimage. Reports
Neuroimage. Reports Neuroscience (General)
CiteScore
1.90
自引率
0.00%
发文量
0
审稿时长
87 days
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