Frontal plane dynamics of the centre of mass during quadrupedal locomotion on a split-belt treadmill
| Autor: | William H. Barnett, J M Rider, Boris I. Prilutsky, Hangue Park, Elizaveta M. Latash, Yaroslav I. Molkov, Alexander N. Klishko |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Dynamics (mechanics) Biomedical Engineering Biophysics Bioengineering Geometry Walking Biochemistry Biomechanical Phenomena Inverted pendulum Biomaterials 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Quadrupedalism Coronal plane Cats Split belt treadmill Animals Life Sciences–Mathematics interface human activities Locomotion 030217 neurology & neurosurgery Geology Biotechnology |
| Zdroj: | J R Soc Interface |
| ISSN: | 1742-5662 1742-5689 |
| DOI: | 10.1098/rsif.2020.0547 |
| Popis: | Our previous study of cat locomotion demonstrated that lateral displacements of the centre of mass (COM) were strikingly similar to those of human walking and resembled the behaviour of an inverted pendulum (Parket al.2019J. Exp. Biol.222, 14. (doi:10.1242/jeb.198648)). Here, we tested the hypothesis that frontal plane dynamics of quadrupedal locomotion are consistent with an inverted pendulum model. We developed a simple mathematical model of balance control in the frontal plane based on an inverted pendulum and compared model behaviour with that of four cats locomoting on a split-belt treadmill. The model accurately reproduced the lateral oscillations of cats' COM vertical projection. We inferred the effects of experimental perturbations on the limits of dynamic stability using data from different split-belt speed ratios with and without ipsilateral paw anaesthesia. We found that the effect of paw anaesthesia could be explained by the induced bias in the perceived position of the COM, and the magnitude of this bias depends on the belt speed difference. Altogether, our findings suggest that the balance control system is actively involved in cat locomotion to provide dynamic stability in the frontal plane, and that paw cutaneous receptors contribute to the representation of the COM position in the nervous system. |
| Databáze: | OpenAIRE |
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