论文标题
N-BACK任务期间的单通道EEG功能与工作内存负载相关
Single-channel EEG features during n-back task correlate with working memory load
论文作者
论文摘要
工作记忆（WM）负载是一个重要的认知特征，与心理努力高度相关。诸如theta功率和额叶活动中的几种神经生物标志物显示，随着WM负载的增加，活性增加。这种相关性通常在认知受损的个体中分解，使WM负载生物标志物成为检测认知障碍的宝贵工具。但是，大多数研究都使用了多渠道脑电图或fMRI，这些脑电图不可访问。在本研究中，我们评估了从额头上的单通道EEG提取的新型特征的能力，以作为WM负载的标记。我们采用了广泛使用的n折任务来操纵WM负载。 14名参与者执行了N-BACK任务，而他们的大脑活动已使用Neurosteer Inc Aurora EEG设备记录。结果表明，新引入的特征的活性随wm载荷增加了，类似于theta频段，但对更高的WM负载变化表现出更高的敏感性。这些更灵敏的WM负载生物标志物是对轻度认知障碍进行大规模筛查的有前途的工具。
Working Memory (WM) load is an important cognitive feature that is highly correlated with mental effort. Several neurological biomarkers such as theta power and mid-frontal activity show increased activity with increasing WM load. Such correlations often break down in cognitively impaired individuals, making WM load biomarkers a valuable tool for the detection of cognitive impairment. However, most studies have used a multi-channel EEG or an fMRI, which are not massively accessible. In the present study, we evaluate the ability of novel features extracted from a single-channel EEG located on the forehead, to serve as markers of WM load. We employed the widely used n-back task to manipulate WM load. Fourteen participants performed the n-back task while their brain activity was recorded with the Neurosteer inc Aurora EEG device. The results showed that the activity of the newly introduced features increased with WM load, similar to the theta band, but exhibited higher sensitivity to finer WM load changes. These more sensitive biomarkers of WM load are a promising tool for mass screening of mild cognitive impairment.
