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JoVE Journal
Neuroscience
全面了解啮齿动物不活动引起的步态改变
全面了解啮齿动物不活动引起的步态改变
JoVE Journal
Neuroscience
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JoVE Journal Neuroscience
Comprehensive Understanding of Inactivity-Induced Gait Alteration in Rodents

全面了解啮齿动物不活动引起的步态改变

Full Text
2,690 Views
04:37 min
July 6, 2022

DOI: 10.3791/63865-v

Junichi Tajino1,2, Tomoki Aoyama1, Hiroshi Kuroki1, Akira Ito1

1Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine,Kyoto University, 2Otolaryngology - Head & Neck Surgery,Ohio State Wexner Medical Center

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Please note that some of the translations on this page are AI generated. Click here for the English version.

本协议描述了三维运动跟踪/评估,以描绘暴露于模拟废弃环境后大鼠的步态运动改变。

我们的协议提供了一个全面的程序来确定关节运动分析的参数。由于缺乏全面的参数定义,关节运动分析通常很复杂。我们展示了普遍适用于相关领域的参数定义的标准原理图。

首先,打开运动记录器应用程序。将老鼠放在跑步机皮带上。将皮带速度提高到每秒 20 厘米。

当老鼠开始以所需的速度正常行走时,单击 记录 图标开始视频捕获。获得 5 到 10 个连续步骤后,通过单击 记录 图标。打开3DCalculator应用程序,以及要分析的视频文件。

通过调整顶部的水平滑块来裁剪视频,以包含足够数量的连续步长。要捕获标记,请将简笔画模型上的标记图例拖动到捕获的视频上的相应标记,然后松开按钮。单击自动跟踪图标。

如果系统无法准确跟踪标记,或者跟踪过程因标记丢失而停止,请单击手动图标切换到手动模式。单击简笔图片上缺少的标记图例,以及视频上的相应标记。打开 KineAnalyzer 应用程序并加载文件。

转到"查看",然后单击"编辑标记母版"菜单。它将打开标记主编辑窗口。单击标记"选项卡上所需的标签或地标,然后单击所需的颜色。

此过程将每个标记指定为特定地标。然后在链接"选项卡上,通过连续单击两个标记来创建对应于每个肢体的线条。通过从"颜色"列中选择所需的颜色,为创建的线条指定颜色。

在角度"选项卡上定义角度。命名角度后,通过单击与每个地标对应的标记,将矢量 A 指定为参考线,将矢量 B 指定为移动线。然后在同一选项卡的"操作"部分中使用值定义角度的方向。

接下来,在距离"选项卡上,定义距离参数。在距离设置部分中选择两个相应的标记。每只六只动物被随机分配到卸载组,其中动物的后肢被尾巴卸载两周,或对照组,其中动物被释放。

站立阶段膝关节和踝关节的归一化轨迹显示,与对照组相比,卸载组在膝关节和踝关节的伸展程度更高。卸荷后2周,空载组中位膝角、踝角等定量指标显著大于对照组。跖骨-髋关节距离几乎相当于站立中期髋关节的高度,在空载组中也明显更高。

这种方法为研究人员提供了如何确定关节运动参数的基础知识。通过这种方式,他们可以建立特定的框架来解决自己的研究问题。

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