Age-Related Deficits in Multijoint Coordination

与年龄相关的多关节协调缺陷

基本信息

项目摘要

The present project focuses on age-related degradation in coordination of movements at multiple joints of the limbs. Studying these deficits is of considerable importance, because movements performed in everyday life (reaching, grasping, pointing, lifting, etc) are essentially multijoint and decreases in coordination is one of the most debilitating aspects of motor performance in the elderly. Our studies of control of multijoint movements in young adults suggest a general direction of research that would investigate reasons for age-related deficits in joint coordination. Namely, recent findings indicate that the biomechanical structure of multijoint limbs imposes constraints on coordination patterns among the joints. The biomechanical constraints are represented by interactive (motion-dependent) torques at the joints. Young subjects are able to overcome the biomechanical constraints and regulate influence of interactive torques with the muscle torques at normal speed movements. However, interactive torques become too influential at high movement speed. Inability of subjects to cope with high amplitudes of these torques and adjust to their fast changes results in movement discoordination. Due to deficits in force control, processing of afferent information, and other age-related deficits in motor performance, we predict that elderly adults have a decreased ability to regulate interactive torques and this is the primary reason for discoordination of multijoint movements in this age group. The present project is designed as a pilot study. Its purpose is to investigate (1) if elderly adults demonstrate inability to regulate interactive torques at tower speed levels than young adults, (2) whether elderly adults are more deficient in movements that require more complicated interactive torque regulation, and (3) if absence of visual information laffects regulation of interactive torques in elderly adults more than in young adults. The obtained data will create a basis for a more detailed and comprehensive research of age-related degradation Iof multijoint movements and mechanisms underlying this degradation.
本项目的重点是与年龄有关的退化,在协调的运动,在多个 四肢的关节研究这些缺陷是相当重要的,因为运动 在日常生活中执行的动作(伸手、抓握、指向、举起等)基本上是多关节的, 协调性的降低是运动表现中最衰弱的方面之一, 老人我们对年轻人多关节运动控制的研究提出了一个总体研究方向,即调查与年龄相关的关节协调缺陷的原因。也就是说,最近的研究结果表明,多关节肢体的生物力学结构对 关节之间的协调模式。生物力学约束表示为 关节处的交互(运动相关)扭矩。年轻的受试者能够克服 生物力学约束和调节的影响,在正常速度运动的肌肉扭矩的相互作用扭矩。然而,在高运动速度下,相互作用的扭矩变得太有影响力。受试者无法科普这些扭矩的高振幅并适应其快速变化,导致运动不协调。由于力控制,传入信息的处理,以及其他与年龄相关的运动性能的缺陷,我们预测,老年人有一个降低的能力,以调节相互作用的扭矩,这是在这个年龄组的多关节运动不协调的主要原因。本项目是一项试点研究。其目的是调查(1)老年人是否表现出比年轻人更不能调节塔速度水平的交互扭矩,(2)老年人是否更缺乏需要更复杂的交互扭矩调节的运动,以及(3)缺乏视觉信息是否影响老年人比年轻人更能调节交互扭矩。获得的数据将为更详细、全面地研究与年龄相关的退化、多关节运动和这种退化的机制奠定基础。

项目成果

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NATALIA V DOUNSKAIA其他文献

NATALIA V DOUNSKAIA的其他文献

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{{ truncateString('NATALIA V DOUNSKAIA', 18)}}的其他基金

Joint Discoordination in Parkinson's Disease
帕金森病的关节不协调
  • 批准号:
    6697299
  • 财政年份:
    2003
  • 资助金额:
    $ 7.49万
  • 项目类别:
Joint Discoordination in Parkinson's Disease
帕金森病的关节不协调
  • 批准号:
    7001296
  • 财政年份:
    2003
  • 资助金额:
    $ 7.49万
  • 项目类别:
Joint Discoordination in Parkinson's Disease
帕金森病的关节不协调
  • 批准号:
    6839416
  • 财政年份:
    2003
  • 资助金额:
    $ 7.49万
  • 项目类别:

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