Inspect3D Tutorial: Treadmill Walking In Healthy Individuals

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Abstract

Visual3D and Inspect3D can be used to automate the processing of large batches of clinical data. This tutorial provides an example of how to do so using a publicly available data set.

Fukuchi et al.[1] published a gold standard public data set of marker-based motion capture to describe healthy individuals walking overground and on a treadmill. Although the authors present a number of descriptive analyses, the effect of using handrail support on gait biomechanics during treadmill walking in this data set has yet to be addressed.

This tutorial is designed to demonstrate how to use Inspect3D to compare joint angles between two groups of older adults: those who used a handrail and those who did not.

Data

The Fukuchi et al. data set includes 3D kinematic data for 26 lower limb and pelvic markers and ground reaction force plate data for 42 subjects walking at 8 different speeds. Motion capture data was sampled at 150 Hz and force plate data was sampled at 300 Hz. Metadata in these trials included anthropometric measurements such as mass, height, leg length, leg dominance, gender, handrail support, and walking speed. For this tutorial only a subset of the data was used, which included the trials with older adults (subjects 25-42) walking at a single comfortable control speed (T05).

To simplify this tutorial, the following premade files are available to download as a starting point:

  • Visual3D Workspaces (file.c3d and file.cmz): Pre-processed .cmz and .c3d files for the elderly subject group (subjects 25-42). Contains pre-made tags (see tag table for description).
  • Visual3D Pipeline (pipeline.v3s): Compiles the static and motion .c3d files, associates them with a model file, and sets premade tags for all of the participants in this dataset. The pipeline produces separate .cmx and .cmz files for each participant
  • Model Template (file.mdh): Provided by Fukuchi et. al. Includes lower body and pelvis segments generated using the 26 anatomical markers, and is applied to the subject .c3d files. If you wish to build your own model, follow the model building tutorial here.
  • Query Definitions (file.q3d): Query definitions for Inspect 3D loading X, Y, and Z components of lower body joint angles, with signals not combined across sides of the body.
  • Inspect3D Color Palette (file.xml): Premade color template used for generating images in this tutorial.

Visual3D Processing

Your text here.

Inspect3D Tags and Grouping

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Inspect3D Visualization and PCA Analysis

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Conclusions

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References

Data set Fukuchi et al. A public dataset of overground and treadmill walking kinematics and kinetics in healthy individuals: [2]

Paper Fukuchi et al. A public dataset of overground and treadmill walking kinematics and kinetics in healthy individuals: [3]

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