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arXiv 2511.02457eess.SP
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使用EEG和fNIRS整合研究心理负荷中的大脑连接性和信息流

Investigating Brain Connectivity and Information Flow in Mental Workload Using EEG and fNIRS Integration

Mohaddese Qaremohammadlou, Mohammad Bagher Shamsollahi

AI总结:

本研究整合EEG和fNIRS信号,利用N-back任务分析心理负荷下大脑的功能与有效连接,发现额叶功能连接随负荷增加,且神经活动对血流动力学响应有主导影响,揭示了神经血管耦合机制。

摘要:

本研究通过整合脑电图(EEG)和功能近红外光谱(fNIRS)信号,调查了心理负荷(MWL)期间的大脑连接性和信息流。利用N-back任务在26名参与者中诱发不同水平的MWL,我们分析了源自EEG和fNIRS组合信号的25个皮质区域的功能连接和有效连接。功能连接使用皮尔逊相关系数(PCC)、锁相值(PLV)和幅度平方相干性(MSC)进行评估,而有效连接使用定向传递函数(dDTF)和广义偏定向相干性(gPDC)进行评估。我们的发现表明,在较高MWL条件下(3-back与0-back相比),额叶区域的功能连接增加。此外,有效连接分析证明了从EEG到fNIRS的显著定向信息流,表明神经活动对血流动力学响应具有主导影响。统计检验证实了低和高MWL状态之间的连接模式存在显著差异。这些结果突出了EEG-fNIRS整合在表征不同认知需求下大脑网络动态方面的效用,并为心理负荷期间的神经血管耦合机制提供了见解。

英文摘要:

This study investigates brain connectivity and information flow during mental workload (MWL) by integrating electroencephalogram (EEG) and functional near-infrared spectroscopy (fNIRS) signals. Utilizing the N-back task to induce varying levels of MWL in 26 participants, we analyzed both functional and effective connectivity across 25 cortical regions derived from combined EEG and fNIRS signals. Functional connectivity was assessed using Pearson Correlation Coefficient (PCC), Phase Locking Value (PLV), and Magnitude Squared Coherence (MSC), while effective connectivity was evaluated using directed Directed Transfer Function (dDTF) and generalized Partial Directed Coherence (gPDC). Our findings reveal increased functional connectivity in frontal regions during higher MWL conditions (3-back compared to 0-back). Furthermore, effective connectivity analysis demonstrates a significant directional information flow from EEG to fNIRS, indicating a dominant influence of neural activity on hemodynamic responses. Statistical tests confirm significant differences in connectivity patterns between low and high MWL states. These results underscore the utility of EEG-fNIRS integration for characterizing brain network dynamics under varying cognitive demands and provide insights into neurovascular coupling mechanisms during mental workload.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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