Distinct bilateral prefrontal activity patterns associated with the qualitative aspect of working memory characterized by individual sensory modality dominance
Distinct bilateral prefrontal activity patterns associated with the qualitative aspect of working memory characterized by individual sensory modality dominance
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DOI：
10.1371/journal.pone.0238235
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发表时间：
2020-08-26
期刊：
影响因子：
3.7
通讯作者：
Yamamoto, Shin-ichiroh
中科院分区：
文献类型：
--
作者：
Matsumoto, Mayuko;Sakurada, Takeshi;Yamamoto, Shin-ichiroh
除了工作记忆容量的数量个体差异外，质量方面，如增强的感觉通道（通道优势），可以表征个体工作记忆能力。本研究的目的是利用功能性近红外光谱（fNIRS）研究工作记忆中个体模态优势成分的神经学基础。为了量化个体WM模态优势的程度，24名参与者被要求找到7个隐藏的目标，并保持他们的空间位置和外观顺序与振动触觉或视觉刺激的援助。在这项搜索任务中，八名参与者表现出较高的性能与触觉条件（斗争占主导地位），而16个表现出视觉优势。然后，我们通过fNIRS测量了在记忆视觉刺激数字的同时手指敲击作为认知运动双任务的前额叶活动。个体模态优势显著相关的双边额极和背外侧前额叶活动的变化在重复的fNIRS会议。特别是，具有较强视觉优势的个体表现出前额区活动的显着减少。这些结果表明，不同的处理模式，在前额叶皮层反映了一个人的定性工作记忆的特点。考虑到前额叶区域的个体通道优势，可能通过优化认知资源来增强认知或运动表现。
In addition to quantitative individual differences in working memory (WM) capacity, qualitative aspects, such as enhanced sensory modality (modality dominance), can characterize individual WM ability. This study aimed to examine the neurological basis underlying the individual modality dominance component of WM using functional near-infrared spectroscopy (fNIRS). To quantify the degree of individual WM modality dominance, 24 participants were required to find seven hidden targets and hold their spatial location and appearance order with vibrotactile or visual stimuli aids. In this searching task, eight participants demonstrated higher performance with the tactile condition (tactile-dominant) whereas sixteen demonstrated visual dominance. We then measured prefrontal activity by fNIRS during memorization of visual stimulus numbers while finger tapping as a cognitive-motor dual-task. Individual modality dominance significantly correlated with bilateral frontopolar and dorsolateral prefrontal activity changes over repeated fNIRS sessions. In particular, individuals with stronger visual dominance showed marked decreases in prefrontal area activity. These results suggest that distinct processing patterns in the prefrontal cortex reflect an individual's qualitative WM characteristics. Considering the individual modality dominance underlying the prefrontal areas could enhance cognitive or motor performance, possibly by optimizing cognitive resources.