Stair ascent comparison of lower limb kinematics with differing time normalization techniques
| Autor: | Max Böhme, Jens Jäkel, Felix Weiske, Johannes Zentner, Maren Witt |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Normalization (statistics)
Dynamic time warping Knee Joint 0206 medical engineering Rehabilitation Biomedical Engineering Biophysics Torso Context (language use) 02 engineering and technology Kinematics Statistical parametric mapping 020601 biomedical engineering Trunk Biomechanical Phenomena 03 medical and health sciences 0302 clinical medicine Gait (human) Lower Extremity Statistics Orthopedics and Sports Medicine Gait 030217 neurology & neurosurgery Statistical hypothesis testing Mathematics |
| Zdroj: | Journal of biomechanics. 119 |
| ISSN: | 1873-2380 |
| Popis: | Understanding gait differences in context of group differences is dependent on statistical testing methods and time normalization techniques (TN). The method induces a relationship of both with one another. As to our knowledge, there has been no investigation into their relation so far. To show empirically what effects may be of importance, we use SPM with linear time interpolation (LI) and Dynamic Time Warping (DTW) separately for data of a study on stair ascent kinematics between two groups. There is a slight difference in statistical significance for the comparison of LI and DTW. LI-uniquely significant time highlight differences due to in-group time-variations, whereas DTW-uniqueness is tied to qualitative differences of homogeneous events. The comparison of stair ascent kinematics with DTW shows more pronounced evidence for backlift-like strategies for the older group, although trunk angles are kept more extended as to ensure stabilty. Thus, the difference in SPM from TN is slight but important, if there is need to mirror said effects methodically. |
| Databáze: | OpenAIRE |
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