Abstract While working is more comfortable in a supine position and healthier in a standing, most people work in a sitting. However, it is unclear whether there are differences in brain activity efficiency in different postures. Here, we, therefore, compared changes in brain activity across three different postures to determine the optimal posture for performing working memory tasks. Their effect on brain activity was examined using EEG signals together with the information of accuracy and reaction times during 2-back task in 24 subjects. Substantial differences in brain waves were observed at sitting and standing positions compared to the supine, especially in delta waves and frontal lobe, where is known to improve the modulation of brain activity efficiently. Brain efficiency was higher during standing and sitting than in a supine. These findings show that postural changes may affect the efficiency of brain activity during working memory tasks. Practitioner summary: Differences in brain efficiency between different postures during working memory tasks have not been explored. This study suggests that efficiency in several brain areas is higher during sitting and standing than in a supine position. This finding has important implications regarding workplace environments. Furthermore, this result would be useful to improve accomplishment and reduce negative effects of work posture. Abbreviations: EEG: electroencephalogram; PSQI: Pittsburgh sleep quality index; KSS: Karolinska sleepiness scale; FFT: fast fourier transform; ROI: region of interest; ANS: autonomic nervous system; Fp: prefrontal; AF: anterior frontal; frontal; Fz: midline frontal; temporal; central; Cz: midline central; P: parietal; Pz: midline parietal; O: occipital; Oz: midline occipital

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不同姿势下工作记忆任务期间的大脑活动——脑电图研究

摘要 虽然仰卧工作更舒适，站立工作更健康，但大多数人以坐姿工作。然而，目前尚不清楚不同姿势下大脑活动效率是否存在差异。因此，我们在这里比较了三种不同姿势下大脑活动的变化，以确定执行工作记忆任务的最佳姿势。使用 EEG 信号以及 24 名受试者在 2-back 任务期间的准确性和反应时间信息来检查它们对大脑活动的影响。与仰卧位相比，坐位和站立位的脑电波存在显着差异，尤其是在三角波和额叶中，已知可以有效地改善大脑活动的调节。站立和坐着时的大脑效率比仰卧时更高。这些发现表明，姿势变化可能会影响工作记忆任务期间大脑活动的效率。从业者总结：工作记忆任务中不同姿势之间大脑效率的差异尚未探索。这项研究表明，与仰卧位相比，坐位和站立时几个大脑区域的效率更高。这一发现对工作场所环境具有重要意义。此外，这一结果将有助于提高成就感并减少工作姿势的负面影响。缩写：EEG：脑电图；PSQI：匹兹堡睡眠质量指数；KSS：卡罗林斯卡嗜睡量表；FFT：快速傅立叶变换；ROI：感兴趣的区域；ANS：自主神经系统；Fp：前额叶；AF：前额叶；正面; Fz：额中线；颞; 中央; 捷克：中线中央；P：顶叶；Pz：顶中线；O：枕骨；Oz：枕中线