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Computing the COM from the COP in postural sway movements |
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| Authors: | Pietro G. Morasso Gino Spada Roberto Capra |
| Affiliation: | a Department of Informatics, Systems and Telecommunication, University of Genova, Via Opera Pia 13, I-16145, Genova, Italy;b Center of Bioengineering, Rehabilitation Hospital la Colletta, Arenzano, Italy |
| Abstract: | A method is described for computing the centre of mass (COM) from empirical estimates of the centre of pressure (COP) obtained by means of a force platform. The method is based on a biomechanical model of sway movements in quiet standing, according to which the horizontal acceleration of the COM is approximately proportional to the COM–COP difference. The equations are solved by approximating the solution with best fitting spline functions. The implications for movement control are discussed. |
| Keywords: | Postural sway Posture control Force platform Center of pressure Center of mass |
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