视觉空间工作记忆负荷调节的电生理学和血液动力学机制:功能性近红外光谱(fNIRS)和脑电图(EEG)研究。

IF 1.6 4区 医学 Q3 BEHAVIORAL SCIENCES
Lisa Zarantonello, Sabrina Brigadoi, Sami Schiff, Patrizia Silvia Bisiacchi, Simone Cutini, Sara Montagnese, Piero Amodio
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引用次数: 0

摘要

n-back 任务被广泛用于研究工作记忆。以往调查n-back任务的电生理学(脑电图[EEG])和血液动力学相关性(功能性近红外光谱[fNIRS])的研究通常基于言语刺激,并且只调查了脑电图频段。我们同时采集了 35 名参与者(16 名男性;年龄 = 26.4 ± 4.3 岁;受教育程度 = 18 ± 2 年)在视觉空间回溯任务中的脑电图和 fNIRS。该任务包括对照条件、低工作记忆负荷实验条件(要求回忆之前的一个刺激)和高工作记忆负荷实验条件(要求回忆之前的两个刺激)。与低负荷和对照条件相比,高负荷条件下的准确率降低,反应时间减慢。在脑电图方面,实验条件下的 P3a 振幅高于对照条件下的 P3a 振幅,低负荷条件下的 P3b 振幅高于高负荷条件下的 P3b 振幅。在 fNIRS 方面,与对照组相比,高负荷条件下的脱氧血红蛋白更高。此外,与左侧额叶皮层相比,中央额叶皮层的激活程度更高。我们的研究表明,视觉空间n-back任务中的工作记忆负荷会影响行为和电生理指标。即使在血液动力学数据上只观察到脱氧血红蛋白的负荷效应,这也与之前的研究一致,并与其电生理学相关性相一致。因此,我们的研究证实了脑电图和 fNIRS 可成功用于多模态采集,但也强调了未来的研究需要开发新版任务。(PsycInfo Database Record (c) 2024 APA,保留所有权利)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electrophysiological and hemodynamic mechanisms underlying load modulations in visuospatial working memory: A functional near-infrared spectroscopy (fNIRS) and electroencephalogram (EEG) study.

The n-back task has been widely used to study working memory. Previous studies investigating the electrophysiological (electroencephalogram [EEG]) and hemodynamic correlates (functional near-infrared spectroscopy [fNIRS]) of the n-back task have been generally based on verbal stimuli and only investigated EEG frequency bands. We simultaneously acquired the EEG and fNIRS in 35 participants (16 males; age = 26.4 ± 4.3 years; educational attainment = 18 ± 2 years) during a visuospatial n-back task. The task encompassed a control condition and a low (requiring to recall one previous stimulus) and a high (requiring to recall two previous stimuli) working memory load experimental conditions. Accuracy decreased and reaction times slowed in the high compared to both low load and control conditions. Regarding EEG, P3a showed higher amplitude in the experimental conditions compared to the control one, and P3b exhibited higher amplitude in the low compared to the high load condition. Regarding fNIRS, the high load condition showed higher deoxygenated hemoglobin compared to the control one. Moreover, the central frontopolar cortex showed higher activation compared with the left frontal cortex. Our study showed that working memory load during a visuospatial n-back task influenced behavioral and electrophysiological indices. Even if the load effect was only observed for deoxygenated hemoglobin on hemodynamic data, this was in line with previous studies and coherent with its electrophysiological correlates. Thus, our study confirms that EEG and fNIRS can be successfully used in multimodal acquisitions, but also highlights that future studies are needed to develop a novel version of the task. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

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来源期刊
Behavioral neuroscience
Behavioral neuroscience 医学-行为科学
CiteScore
3.40
自引率
0.00%
发文量
51
审稿时长
6-12 weeks
期刊介绍: Behavioral Neuroscience publishes original research articles as well as reviews in the broad field of the neural bases of behavior.
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