Complexity of motor control in different motor tasks and populations

• Grant number: 15/00214-6
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): September 01, 2015
• Effective date (End): August 31, 2016
• Field of knowledge: Health Sciences - Physiotherapy and Occupational Therapy
• Principal Investigator: Isabel de Camargo Neves Sacco
• Grantee: Eneida Yuri Suda
• Supervisor: Rogerio Pessoto Hirata
• Host Institution: Faculdade de Medicina (FM). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Research place: Aalborg University (AAU), Denmark
• Associated to the scholarship: 13/06123-7 - Dynamic muscles recruitment patterns during gait using high-density EMG of diabetic patients in different severity degrees classified by a fuzzy system, BP.DR

Abstract

The objective of this project is to develop an experimental study and to analyze data that have already been acquired, in two different contexts in order to explore the concepts of complexity and variability of motor control and motor behavior. Two subprojects will be developed. The purpose of subproject 1 is to investigate the complexity of the patterns of muscular activity in diabetic subjects in different stages of polyneuropathy. We hypothesize that the neuropathy diminishes the complexity of muscular activity, and these alterations are aggravated by the severity of the disease. For this first subproject project EMG data already acquired from 50 diabetic subjects (40-65 yrs old) with different degree of neuropathy during low level force isometric contractions in neuropathic diabetic subjects will be explored by means of nonlinear analysis techniques (multi-scale entropy, fractal dimension, % determinism). The purpose of subproject 2 is to explore postural adaptations induced by muscle pain in different cognitive conditions in healthy subjects. We believe that experimental muscle pain when combined with cognitive load would negatively interfere with the sensory adaptation mechanisms involved in the balance control. 32 healthy men and women (18-50yrs) will be evaluated. Measurements of body sway data during quiet standing for two different cognitive tasks will be performed before and after the injection of sterile hypertonic saline in vastus medialis and vastus lateralis muscles in order to induce pain. Sway displacement and speed in anterior-posterior and in medial-lateral directions will be estimated, as well as sway area. Multiscale entropy analysis of center of pressure will also be performed in order to measure the complexity of postural control. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SUDA, E. Y.; MADELEINE, P.; HIRATA, R. P.; SAMANI, A.; KAWAMURA, T. T.; SACCO, I. C. N.. Reduced complexity of force and muscle activity during low level isometric contractions of the ankle in diabetic individuals. CLINICAL BIOMECHANICS, v. 42, p. 38-46, FEB 2017. (13/05580-5, 13/06123-7, 15/00214-6)

SUDA, ENEIDA YURI; HIRATA, ROGERIO PESSOTO; PALSSON, THORVALDUR; VUILLERME, NICOLAS; SACCO, ISABEL C. N.; GRAVEN-NIELSEN, THOMAS. Experimental knee-related pain enhances attentional interference on postural control. EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY, v. 119, n. 9, p. 2053-2064, SEP 2019. (15/00214-6, 17/15449-4)

SUDA, ENEIDA Y.; SACCO, ISABEL C. N.; HIRATA, ROGERIO P.; SAMANI, AFSHIN; KAWAMURA, THIAGO T.; MADELEINE, PASCAL. LATER STAGES OF DIABETIC NEUROPATHY AFFECT THE COMPLEXITY OF THE NEUROMUSCULAR SYSTEM AT THE KNEE DURING LOW-LEVEL ISOMETRIC CONTRACTIONS. MUSCLE & NERVE, v. 57, n. 1, p. 112-121, JAN 2018. (13/05580-5, 13/06123-7, 15/00214-6)