A Sarcher1, M Raison2, L Ballaz3, M Lemay3, F Leboeuf4, K Trudel5, P A Mathieu6. 1. Research Centre, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada; Department of Mechanical Engineering, Polytechnique Montréal, 2500 Chemin de Polytechnique, Montreal, Quebec, Canada. Electronic address: aurelie.sarcher@polymtl.ca. 2. Research Centre, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada; Department of Mechanical Engineering, Polytechnique Montréal, 2500 Chemin de Polytechnique, Montreal, Quebec, Canada. 3. Research Centre, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada; Department of Kinanthropology, Université du Québec à Montréal, C.P. 8888, succursale Centre-Ville, Montreal, Quebec, Canada. 4. Laboratoire d'analyse du Mouvement, Pôle Médecine Physique et Réadaptation, hôpital Saint Jacques, CHU Nantes, Nantes, France. 5. Marie Enfant Rehabilitation Centre, 5200 Bélanger, Montreal, Quebec, Canada. 6. Research Centre, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada; Institute of Biomedical Engineering, Université de Montréal, 2960 Chemin de la Tour, Montreal, Quebec, Canada.
Abstract
BACKGROUND: Children with spastic hemiplegic cerebral palsy are restricted in their daily activities due to limited active ranges of motion of their involved upper limb, specifically at the elbow. Their impaired muscles are frequently targeted by anti-spastic treatments that reduce muscle tone. But these treatments do not necessarily improve the limb function. There is a lack of comprehensive knowledge of the quantitative relations between muscle activation and joint active ranges of motion. Consequently, the objective of this study is to quantify the impact of muscle activation on the elbow active ranges of motion. METHODS: During voluntary elbow pronation/supination and extension/flexion movements, kinematic and electromyographic measurements were collected from the involved upper limb of 15 children with spastic hemiplegic cerebral palsy (mean age=8.7 years, standard deviation=2.2) and the dominant upper limb of 15 age-matched children who are typically developing. Representative indicators of the muscle activation, such as the muscle co-activation, were extracted from the electromyographic measurements. FINDINGS: Muscle co-activation in the involved upper limb accounted for 78% and 59% of the explained variance of the supination and extension limited active ranges of motion respectively. The agonist and antagonist muscle activations were both longer in the involved upper limb. INTERPRETATIONS: This study succeeded in quantifying the impact of longer antagonist muscle activation on decreased elbow active ranges of motion in children with spastic hemiplegic cerebral palsy. Longer agonist muscle activation suggests that strengthening agonist muscles could increase the extension and supination ranges of motion, which constitutes a perspective of future clinical studies.
BACKGROUND:Children with spastic hemiplegic cerebral palsy are restricted in their daily activities due to limited active ranges of motion of their involved upper limb, specifically at the elbow. Their impaired muscles are frequently targeted by anti-spastic treatments that reduce muscle tone. But these treatments do not necessarily improve the limb function. There is a lack of comprehensive knowledge of the quantitative relations between muscle activation and joint active ranges of motion. Consequently, the objective of this study is to quantify the impact of muscle activation on the elbow active ranges of motion. METHODS: During voluntary elbow pronation/supination and extension/flexion movements, kinematic and electromyographic measurements were collected from the involved upper limb of 15 children with spastic hemiplegic cerebral palsy (mean age=8.7 years, standard deviation=2.2) and the dominant upper limb of 15 age-matched children who are typically developing. Representative indicators of the muscle activation, such as the muscle co-activation, were extracted from the electromyographic measurements. FINDINGS: Muscle co-activation in the involved upper limb accounted for 78% and 59% of the explained variance of the supination and extension limited active ranges of motion respectively. The agonist and antagonist muscle activations were both longer in the involved upper limb. INTERPRETATIONS: This study succeeded in quantifying the impact of longer antagonist muscle activation on decreased elbow active ranges of motion in children with spastic hemiplegic cerebral palsy. Longer agonist muscle activation suggests that strengthening agonist muscles could increase the extension and supination ranges of motion, which constitutes a perspective of future clinical studies.
Authors: Sana Raouafi; Sofiane Achiche; Mickael Begon; Aurélie Sarcher; Maxime Raison Journal: Med Biol Eng Comput Date: 2017-07-01 Impact factor: 2.602
Authors: Rocío Palomo-Carrión; Juan Carlos Zuil-Escobar; Myriam Cabrera-Guerra; Paloma Barreda-Martínez; Carmen Belén Martínez-Cepa Journal: Int J Environ Res Public Health Date: 2021-01-25 Impact factor: 3.390
Authors: Celia Francisco-Martínez; Juan Prado-Olivarez; José A Padilla-Medina; Javier Díaz-Carmona; Francisco J Pérez-Pinal; Alejandro I Barranco-Gutiérrez; Juan J Martínez-Nolasco Journal: Sensors (Basel) Date: 2021-11-26 Impact factor: 3.576