Perturbation to force sharing patterns in 5-digit grasps

描述（由申请人提供）：在患有某些神经和肌肉骨骼疾病的个体中，PHS抓握时的力协调严重受损。对力量协调发展的基本了解对于这些人的手部功能的康复和恢复至关重要。本建议的目的是为了更好地了解在抓取过程中多个抓地力的空间和时间协调的机制。这一目标将通过研究五指抓握过程中对稳定力共享模式的扰动的非自愿矫正力反应来实现。一个新的程序将被引入，elancerous瞬态力的变化，在个别数字，破坏力的共享模式。该提案的具体目的是确定不同的1）力扰动参数（手指扰动、力的方向）和2）初始力分担模式对为补偿扰动而开发的非自愿矫正力响应的影响。我们的初步数据表明，涉及非自愿的纠正反应。我们将测试，纠正力的反应将取决于功能的扰动手指在保持把握稳定性的作用。

DESCRIPTION (provided by applicant): PHS Force coordination in grasping is severely impaired in individuals with certain neurological and musculoskeletal diseases. Basic understanding of the development of force coordination is essential for the rehabilitation and restoration of hand function in these individuals. The objective of the present proposal is to better understand the mechanisms underlying the spatial and temporal coordination of multiple grip forces during grasping. This objective will be pursued by examining involuntary corrective force responses to perturbations to stable force sharing patterns during five-digit grasps. A novel procedure will be introduced that elicits transient force changes in individual digits, disrupting the force sharing pattern. The specific aims of the proposal are to determine the effects of varying 1) force perturbation parameters (digit perturbed, direction of force) and 2) initial force sharing pattern on the involuntary corrective force responses developed to compensate for the perturbation. Our preliminary data suggests that involuntary corrective responses are involved. We will test that the corrective force responses will be dependent upon the function role of the perturbed digit in maintaining grasp stability.