Extracting physiological information in experimental biology via Eulerian video magnification

Background:

Videographic material of animals can contain inapparent signals, such as color changes or motion that hold information about physiological functions, such as heart and respiration rate, pulse wave velocity and vocalization. Eulerian video magnification allows enhancement of such signals to enable their detection. The purpose of this study is to demonstrate how signals relevant to experimental physiology can be extracted from non-contact videographic material of animals.

Results:

We applied Eulerian video magnification to detect physiological signals in a range of experimental models and in captive and free ranging wildlife. Neotenic Mexican axolotls were studied to demonstrate the extraction of heart rate signal of non-embryonic animals from dedicated videographic material. Heart rate could be acquired both in single and multiple animal setups of leucistic and normally colored animals under different physiological conditions (resting, exercised or anesthetized) usi...

Background:

动物的影像资料中可能包含不明显的信号，例如颜色变化或运动，这些信号承载着关于生理功能的信息，如心率、呼吸频率、脉搏波速度和发声。欧拉视频放大技术（Eulerian video magnification）可增强此类信号以实现其检测。本研究旨在展示如何从动物的非接触式影像资料中提取与实验生理学相关的信号。

Results:

我们将欧拉视频放大技术应用于多种实验模型以及圈养和自由活动的野生动物中，以检测生理信号。通过研究幼态延续的墨西哥美西螈（neotenic Mexican axolotls），展示了如何从专用影像资料中提取非胚胎动物的心率信号。在不同生理条件下（静息、运动或麻醉状态），无论是单一还是多只动物设置，无论是白化还是正常体色的动物，均能获取心率