Assessing trunk motor variability in a changing spinal environment: an experimental study.

评估不断变化的脊柱环境中躯干运动的变异性：一项实验研究。

• 批准号: DDG-2015-00013
• 负责人: Descarreaux, Martin
• 金额: $ 0.73万
• 依托单位: Université du Québec à Trois-Rivières
• 依托单位国家: 加拿大
• 项目类别: Discovery Development Grant
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=612417
• 关键词: Assessing; trunk; motor; variability; changing

Motor variability is an important feature of human movement which can be measured using multiple parameters such as performance measures. The main objective of this proposal is to identify and characterize trunk neuromuscular and kinematic adaptations to a “changing spinal environment”. The proposed research program will include a series of experiments designed to each address a specific hypothesis related to trunk and spinal motor variability under varying mechanical and neurophysiological conditions that reflect daily activities. These studies will provide critical information regarding the development of acute and long term motor adaptation in the complex musculoskeletal spinal system. The results and knowledge derived from these studies could, in the long run, provide new insights on how intrinsic spinal variability can be exploited as a source of biomechanical variations without compromising work-related or other type of performances. The research program could lead to the development of innovative applications in sport performance and work productivity, standardised functional spinal evaluation and biomedical engineering diagnostic tools, as well as progress in risk assessment strategies in ergonomics. All the proposed experiments are based on the assessment of similar motor variability variables under varying experimental conditions. Independent groups of healthy adult volunteers will be recruited to participate in each of these experiments where they will be asked to perform a series of standardized task involving spinal movement and stabilization. The current proposal seeks to investigate if spinal adaptations in movement patterns and muscle recruitment are task-specific, or if individuals use a similar and “rather typical” adaptation pattern across a range of tasks. We will try to answer the following research questions: [1] Investigate how changes in spinal stabilisation mechanisms affect muscle recruitment strategies and trunk kinematics during voluntary trunk movement [2] Determine how these changes also affect the muscle recruitment strategies and trunk kinematics during fast-adaptation reactive trunk movements [3] Investigate how nociceptive segmental inputs affect muscle recruitment strategies and trunk kinematics, and [4] Investigate how sustained cyclic exercises modify muscle recruitment strategies and trunk kinematics. Neuromuscular motor variability will be quantified using the spatial representation of muscular activity in EMG matrices as well as movement patterns during the various experimental protocols. My goal, with the present proposal, is to create an educational environment for graduate students that will foster interdisciplinary collaboration in order to ensure both diversified and high quality training of young researchers in the fields of motor control, biomechanics and signal processing.

运动变异性是人体运动的一个重要特征，可以使用多个参数（如性能指标）进行测量。这项建议的主要目的是确定和表征躯干神经肌肉和运动学适应“不断变化的脊柱环境”。拟议的研究计划将包括一系列实验，旨在解决与躯干和脊髓运动变异性相关的特定假设，这些假设反映了日常活动的不同机械和神经生理条件。这些研究将为复杂的肌肉骨骼脊柱系统的急性和长期运动适应的发展提供关键信息。从长远来看，从这些研究中获得的结果和知识可以提供关于如何将内在脊柱变异性作为生物力学变异的来源而不影响工作相关或其他类型的性能的新见解。该研究计划可能会导致在运动表现和工作效率，标准化的功能脊柱评估和生物医学工程诊断工具，以及在人体工程学的风险评估策略的进展创新应用的发展。所有拟议的实验是基于不同的实验条件下的类似的运动变异性变量的评估。将招募独立的健康成年志愿者组参与这些实验中的每一个，在这些实验中，他们将被要求执行一系列涉及脊柱运动和稳定的标准化任务。目前的建议旨在调查运动模式和肌肉招募中的脊柱适应是否是特定于任务的，或者个人是否在一系列任务中使用类似且“相当典型”的适应模式。我们将尝试回答以下研究问题：[1]研究脊柱稳定机制的变化如何影响自主躯干运动期间的肌肉募集策略和躯干运动学[2]确定这些变化如何也影响快速适应反应性躯干运动期间的肌肉募集策略和躯干运动学[3]研究伤害性节段输入如何影响肌肉募集策略和躯干运动学，和[4]研究持续的周期性运动如何改变肌肉募集策略和躯干运动学。将使用EMG矩阵中肌肉活动的空间表示以及各种实验方案期间的运动模式来量化神经肌肉运动变异性。我的目标，与目前的建议，是为研究生创造一个教育环境，将促进跨学科的合作，以确保在运动控制，生物力学和信号处理领域的年轻研究人员的多样化和高质量的培训。