The effect of body posture on cognitive performance: a question of sleep quality
The effect of body posture on cognitive performance: a question of sleep quality
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身体姿势对认知能力的影响：睡眠质量问题
DOI：
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发表时间：
2014
影响因子：
2.9
通讯作者：
S. Zaunseder
中科院分区：
文献类型：
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作者：
Markus Muehlhan;M. Marxen;Julia Landsiedel;H. Malberg;S. Zaunseder
几乎所有的功能性磁共振成像（fMRI）研究都是在仰卧体位下进行的，这被认为是此类检查的潜在混杂因素。文献表明，仰卧和直立姿势的认知功能，如解决问题或感知，是不同的。然而，姿势对许多认知功能的影响仍然是未知的。因此，本研究的目的是调查身体姿势（仰卧与坐）的影响，在认知科学中最常用的范式之一：N-back工作记忆范式。22例受试者采用随机受试者内设计进行研究。受试者连续两天以仰卧或直立姿势进行N-back任务。主观睡眠质量和慢性压力被记录为协变量。此外，在实验过程中，情绪维度和心率变异性（HRV）的变化进行了评估。结果表明，睡眠质量强烈影响反应时间时，受试者进行了工作记忆任务，在仰卧位。然而，在坐姿下无法观察到这些效果。这些发现可以用HRV参数来解释，这些参数表明直立与仰卧姿势的自主调节差异。当不能排除睡眠质量的组间差异时，这一发现与fMRI组间比较特别相关。
Nearly all functional magnetic resonance imaging (fMRI) studies are conducted in the supine body posture, which has been discussed as a potential confounder of such examinations. The literature suggests that cognitive functions, such as problem solving or perception, differ between supine and upright postures. However, the effect of posture on many cognitive functions is still unknown. Therefore, the aim of the present study was to investigate the effects of body posture (supine vs. sitting) on one of the most frequently used paradigms in the cognitive sciences: the N-back working memory paradigm. Twenty-two subjects were investigated in a randomized within-subject design. Subjects performed the N-back task on two consecutive days in either the supine or the upright posture. Subjective sleep quality and chronic stress were recorded as covariates. Furthermore, changes in mood dimensions and heart rate variability (HRV) were assessed during the experiment. Results indicate that the quality of sleep strongly affects reaction times when subjects performed a working memory task in a supine posture. These effects, however, could not be observed in the sitting position. The findings can be explained by HRV parameters that indicated differences in autonomic regulation in the upright vs. the supine posture. The finding is of particular relevance for fMRI group comparisons when group differences in sleep quality cannot be ruled out.
影响因子：
10.8
作者：
Yeragani, VK;Sobolewski, E;Igel, G
通讯作者：
Igel, G