The effects of views of nature on autonomic control
The effects of views of nature on autonomic control
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DOI：
10.1007/s00421-012-2318-8
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发表时间：
2012-09-01
影响因子：
3
通讯作者：
Sandercock, G. R. H.
中科院分区：
文献类型：
--
作者：
Gladwell, V. F.;Brown, D. K.;Sandercock, G. R. H.
此前的研究表明，大自然可以改善情绪和自尊，降低血压。有人建议在自然环境中行走可以改变自主神经系统的控制，但其机制还不完全清楚。心率变异性(HRV)是一种评估自主神经控制的非侵入性方法，可以深入了解迷走神经的调节。我们的假设是，与构建的场景相比，在受控的实验室环境中单独观看自然会导致更高水平的HRV。在受控环境中观看不同场景时测量心率(HR)和血压(BP)。心率变异性被用来研究自主神经活动的变化，特别是副交感神经活动。每个参与者都半仰卧地躺在实验室里，我们记录了他们观看两组幻灯片(一组包含自然景观，另一组包含构建的场景)的5分钟(n=29)的心电、血压和呼吸。在观看大自然的过程中，副交感神经活动的标志物在两项研究中都有所增加。与建成场景相比，连续差的均方根值增加了4.2+/-A7.7ms(t=2.9，p=0.008)，高频自然对数增加了0.19+/-A0.36ms(2)Hz(-1)(t=2.9，p=0.007)。平均心率和血压无明显变化。这项研究提供了证据，证明心脏的自主控制可以通过仅仅观看迷走活动增加的自然场景的简单行为来改变。
Previously studies have shown that nature improves mood and self-esteem and reduces blood pressure. Walking within a natural environment has been suggested to alter autonomic nervous system control, but the mechanisms are not fully understood. Heart rate variability (HRV) is a non-invasive method of assessing autonomic control and can give an insight into vagal modulation. Our hypothesis was that viewing nature alone within a controlled laboratory environment would induce higher levels of HRV as compared to built scenes. Heart rate (HR) and blood pressure (BP) were measured during viewing different scenes in a controlled environment. HRV was used to investigate alterations in autonomic activity, specifically parasympathetic activity. Each participant lay in the semi-supine position in a laboratory while we recorded 5 min (n = 29) of ECG, BP and respiration as they viewed two collections of slides (one containing nature views and the other built scenes). During viewing of nature, markers of parasympathetic activity were increased in both studies. Root mean squared of successive differences increased 4.2 +/- A 7.7 ms (t = 2.9, p = 0.008) and natural logarithm of high frequency increased 0.19 +/- A 0.36 ms(2) Hz(-1) (t = 2.9, p = 0.007) as compared to built scenes. Mean HR and BP were not significantly altered. This study provides evidence that autonomic control of the heart is altered by the simple act of just viewing natural scenes with an increase in vagal activity.