TENDON FORCE DURING OCCUPATIONAL HAND ACTIVITIES

描述：(改编自《调查员摘要》)与工作相关 由于重复的手部任务而引起的肌肉骨骼疾病主要涉及 手指和手腕的肌腱，但没有测量负荷 与职业环境相关的这些肌腱所经历的。 目前估计这些组织中的力的方法是使用生物力学 模型或表面肌电图，这两个都没有得到验证。 首席研究员建议直接测量食指屈肌 40例手部手术受试者手腕肌腱受力分析 受试者执行特定的手部任务。指尖作用力和手指姿势 也将被记录下来。首先，将在以下位置重复握手任务 不同的力量水平、手指姿势和负荷率。第二, 不同设计的开关将被手指反复激活。 选择可推广到工作场所的任务条件。这个 不同作业条件对肌腱张力和指尖比的影响 将对肌腱受力进行评估。结合手指姿势数据， 这些信息还将用于评估现有的生物力学模型。 如果模型的精度较差，则修改模型或新模型 将会被提出。 最终目标是确定药物的剂量-反应关系 指尖负重到肌腱负重，以便为手动工具提供指南 设计和使用工具将肌腱负荷降至最低，从而降低风险 出现肌腱相关疾病的可能性。 这项拟议的研究是加州大学与哥伦比亚大学合作开展的 加州人体工程学计划(UCSF)、手和显微外科(UCSP)、 机械工程(加州大学伯克利分校)和Smith-Kettlewell眼科研究 研究所。

DESCRIPTION: (Adapted from Investigator's Abstract) Work-related musculoskeletal disorders due to repeated hand tasks involve primarily the tendons of the fingers and the wrist, yet there are no measures of the load experienced by these tendons that are relevant to the occupational setting. Current methods of estimating forces in these tissues use biomechanical models or surface electromyograms, neither of which has been validated. The principal investigator proposes to directly measure index finger flexor tendon force at the wrist in 40 subjects undergoing hand surgery while the subjects perform specific hand tasks. Fingertip force and finger posture will also be recorded. First, a pinch grip task will be repeated at different force levels, finger postures, and loading rates. Second, switches of different design will be repeatedly activated by the finger. Task conditions are selected that can be generalized to the workplace. The effect of these task conditions on tendon force and the ratios of fingertip to tendon force will be evaluated. Combined with the finger posture data, the information will also be used to evaluate existing biomechanical models. If the accuracy of the models is poor, then modified models or new models will be proposed. The ultimate goal is to determine the dose-response relationships of fingertip load to tendon load in order to provide guidelines for hand tool design and tool use to minimize tendon loading, and thereby reduce the risk of developing tendon related disorders. The proposed study is a collaborative effort between the University of California Ergonomics Program (UCSF), Hand and Microsurgery (UCSP), Mechanical Engineering (UC Berkeley), and the Smith-Kettlewell Eye Research Institute.