Distribution of mass and center of pressure in dynamic balance presented by an instrumented wobble board
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ORIGINAL ARTICLE
Distribution of mass and center of pressure in dynamic balance presented by an instrumented wobble board André Roberto Fernandes da Silva 1 & Leandro Lazzareschi 1 & Karoline de Paula Bischof 1 & Marcio Tadashi Ishizaki 1 & Silvia Cristina Martini 1 & Terigi Augusto Scardovelli 1 & Silvia Regina Matos da Silva Boschi 1 & Alessandro Pereira da Silva 1 Received: 14 May 2020 / Accepted: 27 August 2020 # Sociedade Brasileira de Engenharia Biomedica 2020
Abstract Introduction The wobble board (WB) is an unstable platform that allows proprioceptive balance training. However, because it is a passive device, it does not provide quantitative data about the training, making it difficult for the therapist to track their patients’ performance. The aim of this study was to develop and validate a supervisory system and the data acquisition based on hardware (WB) and software (control app) elements that allow the dynamic balance evaluation. Methods An electronic system was placed on a WB. Its tilt was measured using an accelerometer. A supervisory system, capable of calculating the mass distribution (MD) and the center of pressure (CoP), was developed. Firstly, in order to validate the system, a functional test was performed; then, thirty volunteers were submitted to the test protocol approved by the research ethic committee of the University of Mogi das Cruzes. Results The results of the functional tests showed that the supervisory system was able to correctly calculate the MD and the CoP. In the test with volunteers, no significant difference was observed between the tests with and without visual feedback of the balance oscillation. Conclusion The developed system is portable and capable of storing data for future analysis. The combination of the tilt’s, MD’s, and CoP’s values generated a detailed analysis of the exercises performed, allowing the therapist to track the performance of the patients and adapt the exercise to their needs, making the treatment using the WB more effective. Keywords Wobble board . Center of pressure . Dynamic balance . Force platform
* André Roberto Fernandes da Silva [email protected] Leandro Lazzareschi [email protected] Karoline de Paula Bischof [email protected] Marcio Tadashi Ishizaki [email protected] Silvia Cristina Martini [email protected] Terigi Augusto Scardovelli [email protected] Silvia Regina Matos da Silva Boschi [email protected] Alessandro Pereira da Silva [email protected] 1
Technology Research Center, University of Mogi das Cruzes, (UMC), Mogi das Cruzes, SP 08780-911, Brazil
Introduction Body balance is the ability to maintain the center of the body mass within the support base with minimal oscillation (Prosperini and Pozzilli 2013). It is obtained through a set of sensory information generated by the visual, vestibular, and somatosensory systems (Julià-Sánchez et al. 2016). These systems create a reference frame, allowing the control of the joints’ muscle strength, neutralizing any oscillation to the body orientation (Chiba
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