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Does Heart Rate Variability Predict Human Cognitive Performance at Higher Memory Loads?

机译:心率可变性是否会在较高的内存负荷下预测人类认知性能?

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Background: Literature suggests an association between heart rate variability (HRV) and human cognitive performance. However, their correlation has not been worked out yet. The effect of cognitive load on HRV has not been investigated using visuospatial working memory (VSWM) task.Objective: The objective of this study conducted on healthy human subjects was to explore the relationship between HRV (which reflects the autonomic activity) with cognitive performance (which is cortically mediated) using a visuospatial working memory paradigm.Methods: Since humans have to routinely cope with many aspects of memory simultaneously, a VSWM task that involved various elements of memory simultaneously was designed. Twenty-four healthy subjects performed the VSWM paradigm that had three tasks of increasing memory loads. ECG was recorded simultaneously for the quantification of HRV. Time and frequency domain analysis of HRV was performed. Multivariate analysis was performed to evaluate the effect of memory load (3 memory loads) on HRV measures. Pearson correlation analysis was performed to study the association between the HRV measures with the performance at each memory load.Results: The results showed that HRV decreased with an increase in memory load. Low HRV was found to be associated with poor performance.Conclusion: The results imply an 'integrated' neural network of adaptive regulation that controls cognitive performance and autonomic functions. HRV could potentially serve as an index of healthy individual's cognitive capacity.
机译:背景:文献表明心率变异性(HRV)与人类认知性能之间的关联。但是,他们的相关性尚未解决。使用粘合空间工作记忆(VSWM)任务来研究认知负荷对HRV的影响。目的:对健康人类受试者进行的本研究的目的是探讨HRV(反映自主活动)与认知性能之间的关系(使用visuosatepatial工作记忆帕拉德方式进行切口介导。由于人类同时必须经常应对存储器的许多方面,因此设计了同时涉及各种内存元素的VSWM任务。二十四个健康受试者进行了VSWM范例,其中有三个增加了内存负荷的任务。 ECG被同时记录,以定量HRV。进行HRV的时间和频域分析。进行多变量分析以评估内存负荷(3个存储器负载)对HRV措施的影响。进行Pearson相关性分析以研究HRV测量与每个内存负荷的性能之间的关联。结果:结果表明,HRV随着内存负荷的增加而降低。发现低HRV与性能不佳相关。结论:结果意味着控制认知性能和自主神经功能的自适应规范的“集成”神经网络。 HRV可能是健康的个人认知能力的指标。

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