The Effects of a Single Session of Upper Alpha Neurofeedback for Cognitive Enhancement: A Sham-Controlled Study
The Effects of a Single Session of Upper Alpha Neurofeedback for Cognitive Enhancement: A Sham-Controlled Study
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DOI：
10.1007/s10484-014-9262-9
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发表时间：
2014-12-01
影响因子：
3
通讯作者：
Minguez, J.
中科院分区：
文献类型：
--
作者：
Escolano, C.;Navarro-Gil, M.;Minguez, J.
神经反馈（NF）非特异性因素的最小化是进一步推进对此类手术效果的理解的一个重要方面。本文研究了遵循假对照实验设计（19 名健康参与者）的单次（25 分钟）个体上 α 增强的 NF 效果。我们测量了训练后的即时效果和 1 天持续脑电图效果（闭眼静息状态和任务相关活动），以及执行心理旋转任务期间的事件锁定脑电图效果。这些指标是在经过训练的（上阿尔法）和未经训练的脑电图参数（下阿尔法和下贝塔）中计算的。评估了几种认知功能，例如工作记忆和心理旋转能力。 NF 组在任务相关活动训练后表现出较高的 α 功率（1 天后未显着持续），并且在心理旋转任务期间表现出较高的刺激前功率。两组的认知表现均有所改善，其中 NF 组的改善更为显着，但单次训练似乎不足以在组间产生显着差异。为了对电生理学产生持久的影响并增强行为效果，似乎有必要进行更多的培训课程。
The minimization of the non-specific factors of neurofeedback (NF) is an important aspect to further advance in the understanding of the effects of these types of procedures. This paper investigates the NF effects of a single session (25 min) of individual upper alpha enhancement following a sham-controlled experimental design (19 healthy participants). We measured immediate effects after the training and 1-day lasting EEG effects (eyes closed resting state and task-related activity), as well as the event-locked EEG effects during the execution of a mental rotation task. These metrics were computed in trained (upper alpha) and non-trained EEG parameters (lower alpha and lower beta). Several cognitive functions were assessed such as working memory and mental rotation abilities. The NF group showed increased upper alpha power after training in task-related activity (not significantly sustained 1 day after) and higher pre-stimulus power during the mental rotation task. Both groups improved cognitive performance, with a more prominent improvement for the NF group, however a single session seems to be insufficient to yield significant differences between groups. A higher number of training sessions seems necessary to achieve long-lasting effects on the electrophysiology and to enhance the behavioral effects.