Manuela Brito Duarte1, Anderson Antunes da Costa Moraes2, Eduardo Veloso Ferreira3, Gizele Cristina da Silva Almeida4, Enzo Gabriel da Rocha Santos5, Gustavo Henrique Lima Pinto5, Paulo Rui de Oliveira6, César Ferreira Amorim7, André Dos Santos Cabral8, Ghislain Saunier9, Anselmo de Athayde Costa E Silva10, Anderson Belgamo11, Givago da Silva Souza12, Bianca Callegari13. 1. Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil. Electronic address: manubritd@gmail.com. 2. Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil. Electronic address: antunesanderson@hotmail.com. 3. Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil. Electronic address: eduadocvf@gmail.com. 4. Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil. Electronic address: g.c.fisioterapia@gmail.com. 5. Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, R. Augusto Corrêa, 01, Belém 66093-020, PA, Brazil. 6. Doctoral and Masters Program in Physical Therapy, UNICID, 448/475 Cesário Galeno St., São Paulo, SP, Brazil. Electronic address: paulo.oliveira@unicid.edu.br. 7. Doctoral and Masters Program in Physical Therapy, UNICID, 448/475 Cesário Galeno St., São Paulo, SP, Brazil; Département des Sciences de la Santé, Programme de physiothérapie de l'université McGill offert en extension à l'UQAC, Saguenay, Québec, Canada; Physical Therapy and Neuroscience Departments, Wertheims' Colleges of Nursing and Health Sciences and Medicine, Florida International University (FIU), Miami, FL, United States. 8. Centro de Ciências Biológicas e da Saúde, Universidade do Estado do Pará, Tv. Perebebuí, 2623 - Marco, Belém, PA 66087-662, Brazil. Electronic address: andre.cabral@uepa.br. 9. Laboratório de Cognição Motora, Departamento de Anatomia, Universidade Federal do Pará, Rua Augusto Corrêa 01, Belém 66075-110, PA, Brazil. Electronic address: ghislain@ufpa.br. 10. Programa de Pós Graduação em Ciências do Movimento, Universidade Federal do Pará, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil. Electronic address: anselmocs@ufpa.br. 11. Departamento de Ciência da Computação, Instituto Federal de São Paulo, Piracicaba, Brazil. Electronic address: abelgamo@gmail.com. 12. Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa 01, Belém 66075-110, PA, Brazil. Electronic address: givagosouza@ufpa.br. 13. Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil; Programa de Pós Graduação em Ciências do Movimento, Universidade Federal do Pará, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil. Electronic address: callegari@ufpa.br.
Abstract
BACKGROUND: Postural adjustments involve displacements of the center of mass (COM), controlled by the central nervous system (CNS), to maintain equilibrium whilst standing. Postural adjustments can be anticipatory (APAs) or compensatory (CPAs), and are triggered to counteract predictable perturbations. RESEARCH QUESTION: Is the new smartphone application, Momentum, a valid and reliable tool for the assessment of body balance, by measuring APAs and CPAs using accelerometer readings? METHODS: 20 young adults were exposed to external predictable perturbations induced at the shoulder level, whilst standing. COM linear acceleration was recorded by Momentum (extracting data from a smartphone's accelerometer) and a 3D motion capture system. RESULTS: The key results demonstrated a very high, significant correlation (r ≥ 0.7, p < 0.05) between the two device settings in the APA parameters, which obtained r = 0.65, denoting a high correlation. Considering the reliability, variables that are compensatory in nature are presented on a scale of good to excellent in measurement methods, kinematics, and Momentum. However, the anticipatory variables presented excellent reliability only for the kinematics. SIGNIFICANCE: These experiments show that Momentum is a valid method for measuring COM acceleration under predictable perturbations and is reliable for compensatory events.
BACKGROUND: Postural adjustments involve displacements of the center of mass (COM), controlled by the central nervous system (CNS), to maintain equilibrium whilst standing. Postural adjustments can be anticipatory (APAs) or compensatory (CPAs), and are triggered to counteract predictable perturbations. RESEARCH QUESTION: Is the new smartphone application, Momentum, a valid and reliable tool for the assessment of body balance, by measuring APAs and CPAs using accelerometer readings? METHODS: 20 young adults were exposed to external predictable perturbations induced at the shoulder level, whilst standing. COM linear acceleration was recorded by Momentum (extracting data from a smartphone's accelerometer) and a 3D motion capture system. RESULTS: The key results demonstrated a very high, significant correlation (r ≥ 0.7, p < 0.05) between the two device settings in the APA parameters, which obtained r = 0.65, denoting a high correlation. Considering the reliability, variables that are compensatory in nature are presented on a scale of good to excellent in measurement methods, kinematics, and Momentum. However, the anticipatory variables presented excellent reliability only for the kinematics. SIGNIFICANCE: These experiments show that Momentum is a valid method for measuring COM acceleration under predictable perturbations and is reliable for compensatory events.
Authors: Patrícia Seixas Alves Santos; Enzo Gabriel Rocha Santos; Luis Carlos Pereira Monteiro; Bruno Lopes Santos-Lobato; Gustavo Henrique Lima Pinto; Anderson Belgamo; André Santos Cabral; Anselmo de Athayde Costa E Silva; Bianca Callegari; Givago Silva Souza Journal: Sci Rep Date: 2022-10-07 Impact factor: 4.996