Longitudinal quasi-static stability predicts changes in dog gait on rough terrain
| Autor: | Michelle A. Reeve, G. Clark Haynes, Andrew J. Spence, Daniel E. Koditschek, Simon Wilshin, Shai Revzen |
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| Rok vydání: | 2017 |
| Předmět: |
Male
0301 basic medicine Uneven terrain Physiology Effect of gait parameters on energetic cost Perturbation (astronomy) Terrain Walking Aquatic Science Stability (probability) 03 medical and health sciences Dogs 0302 clinical medicine Inertial measurement unit Dynamical systems Dog Animals Gait Molecular Biology Ecology Evolution Behavior and Systematics Communication business.industry Movement (music) Extremities Models Theoretical Geodesy Biomechanical Phenomena Preferred walking speed Quasi-static stability 030104 developmental biology Phase Insect Science Female Animal Science and Zoology business 030217 neurology & neurosurgery Geology Research Article |
| Zdroj: | The Journal of Experimental Biology |
| ISSN: | 1477-9145 0022-0949 |
| DOI: | 10.1242/jeb.149112 |
| Popis: | Legged animals utilize gait selection to move effectively and must recover from environmental perturbations. We show that on rough terrain, domestic dogs, Canis lupus familiaris, spend more time in longitudinal quasi-statically stable patterns of movement. Here, longitudinal refers to the rostro-caudal axis. We used an existing model in the literature to quantify the longitudinal quasi-static stability of gaits neighbouring the walk, and found that trot-like gaits are more stable. We thus hypothesized that when perturbed, the rate of return to a stable gait would depend on the direction of perturbation, such that perturbations towards less quasi-statically stable patterns of movement would be more rapid than those towards more stable patterns of movement. The net result of this would be greater time spent in longitudinally quasi-statically stable patterns of movement. Limb movement patterns in which diagonal limbs were more synchronized (those more like a trot) have higher longitudinal quasi-static stability. We therefore predicted that as dogs explored possible limb configurations on rough terrain at walking speeds, the walk would shift towards trot. We gathered experimental data quantifying dog gait when perturbed by rough terrain and confirmed this prediction using GPS and inertial sensors (n=6, P Summary: Dogs co-ordinate their limbs on rough terrain in a manner consistent with optimization for quasi-static longitudinal stability. |
| Databáze: | OpenAIRE |
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