Chikh Soufien, Garnier Cyril, Faupin Arnaud, Pinti Antonio, Boudet Samuel, Azaiez Fairouz, Watelain Eric
Institut Supérieur du Sport et de l'Education Physique de Sfax, Unité de Recherche GEDES, Faculté des lettres et des Sciences Humaines de Sfax, Tunisia.
Univ Lille Nord de France, F-59000 Lille, France; UVHC, LAMIH-Dptm SHV, F-59313 Valenciennes, France; CNRS, UMR 8201, F-59313 Valenciennes, France.
J Electromyogr Kinesiol. 2018 Jun;40:16-22. doi: 10.1016/j.jelekin.2018.03.001. Epub 2018 Mar 13.
Arm-trunk coordination during the initiation of displacement in manual wheelchair is a complex task. The objective of this work is to study the arm-trunk coordination by measuring anticipatory and compensatory postural adjustments. Nine healthy subjects participated in the study after being trained in manual wheelchair. They were asked to initiate a displacement in manual wheelchair in three directions (forward vs. left vs. right), with two speeds (spontaneous vs. maximum) and with two initial hand's positions (hands on thighs vs. hands on handrails). Muscular activities in the trunk (postural component) and the arms (focal component) were recorded bilaterally. The results show two strategies for trunk control: An anticipatory adjustment strategy and a compensatory adjustment strategy with a dominance of compensation. These two strategies are influenced by the finalities of displacement in terms of speed and direction depending on the hands positions. Arm-trunk coordination is characterized by an adaptability of anticipatory and compensatory postural adjustments. The study of this type of coordination for subjects with different levels of spinal cord injury could be used to predict the forthcoming displacement and thus assist the user in a complex task.
手动轮椅移位起始过程中的手臂 - 躯干协调是一项复杂的任务。本研究的目的是通过测量预期性和补偿性姿势调整来研究手臂 - 躯干协调。九名健康受试者在接受手动轮椅训练后参与了该研究。他们被要求在手动轮椅上向三个方向（向前、向左、向右）移位，有两种速度（自发速度和最大速度）以及两种初始手部位置（手放在大腿上和手放在扶手上）。双侧记录了躯干（姿势成分）和手臂（焦点成分）的肌肉活动。结果显示了两种躯干控制策略：一种预期性调整策略和一种以补偿为主导的补偿性调整策略。这两种策略受移位的速度和方向目的影响，具体取决于手部位置。手臂 - 躯干协调的特点是预期性和补偿性姿势调整具有适应性。对不同脊髓损伤水平的受试者进行此类协调研究，可用于预测即将发生的移位，从而在复杂任务中协助使用者。
