Neural mechanisms of Chinese character recognition, updating, and maintenance in the N-back task

IF 2.5 3区心理学 Q3 NEUROSCIENCES

International Journal of Psychophysiology Pub Date : 2024-05-01 DOI:10.1016/j.ijpsycho.2024.112356

Hongli Li , Jianru Feng , Xiaoxuan Shi , Xin Zhao

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引用次数: 0

Abstract

Using the N-back task, we investigated how memory load influences the neural activity of the Chinese character cognitive subprocess (recognition, updating, and maintenance) in Mainland Chinese speakers. Twenty-seven participants completed the Chinese character N-back paradigm while having their event-related potentials recorded. The study employed time and frequency domain analyses of EEG data. Results showed that accuracy decreased and response times increased with larger N values. For ERPs, N2pc and P300 amplitudes decreased and SW amplitude increased with larger N values. For time frequency analyses, the desynchronization of alpha oscillations decreased after stimulus onset, but the synchronization of alpha oscillations increased during the maintenance phase. The results suggest that greater memory load is related to a decrease in cognitive resources during updating and an increase in cognitive resources during information maintenance. The results of a behavioral-ERP data structural equation model analysis showed that the ERP indicators in the maintenance phase predicted behavioral performance.

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N-回任务中汉字识别、更新和保持的神经机制

我们利用 N 回任务研究了记忆负担如何影响中国大陆汉语使用者的汉字认知子过程（识别、更新和保持）的神经活动。27名参与者在完成汉字N-back范式的同时记录了他们的事件相关电位。研究对脑电图数据进行了时域和频域分析。结果显示，N值越大，准确率越低，反应时间越长。在ERP方面，N2pc和P300振幅随着N值的增大而减小，SW振幅随着N值的增大而增大。在时频分析中，α振荡的非同步性在刺激开始后下降，但在α振荡的同步性在维持阶段上升。结果表明，记忆负担的增加与更新过程中认知资源的减少和信息维持过程中认知资源的增加有关。行为-ERP数据结构方程模型分析结果显示，维持阶段的ERP指标可预测行为表现。

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来源期刊

International Journal of Psychophysiology 医学-神经科学

CiteScore

5.40

自引率

10.00%

发文量

177

审稿时长

3-8 weeks

期刊介绍： The International Journal of Psychophysiology is the official journal of the International Organization of Psychophysiology, and provides a respected forum for the publication of high quality original contributions on all aspects of psychophysiology. The journal is interdisciplinary and aims to integrate the neurosciences and behavioral sciences. Empirical, theoretical, and review articles are encouraged in the following areas: • Cerebral psychophysiology: including functional brain mapping and neuroimaging with Event-Related Potentials (ERPs), Positron Emission Tomography (PET), Functional Magnetic Resonance Imaging (fMRI) and Electroencephalographic studies. • Autonomic functions: including bilateral electrodermal activity, pupillometry and blood volume changes. • Cardiovascular Psychophysiology:including studies of blood pressure, cardiac functioning and respiration. • Somatic psychophysiology: including muscle activity, eye movements and eye blinks.