TENDON FORCE DURING OCCUPATIONAL HAND ACTIVITIES

描述：（改编自研究者摘要）工作相关 肌肉骨骼疾病由于重复的手的任务，主要涉及 手指和手腕的肌腱，但没有负载的措施， 这些肌腱所经历的与职业环境相关的疾病。 目前估计这些组织中的力的方法使用生物力学 模型或表面肌电图，两者都没有得到验证。 主要研究者建议直接测量食指屈肌 40例手部手术受试者的腕部肌腱力， 受试者执行特定的手部任务。 指尖力和手指姿势 也将被记录。 首先，将重复捏握任务， 不同的力量水平、手指姿势和加载速率。 第二、 不同设计的开关将被手指重复激活。 选择可推广到工作区的任务条件。 的 这些任务条件对肌腱力和指尖比率的影响 将对钢筋束力进行评估。 结合手指姿态数据， 这些信息还将用于评估现有的生物力学模型。 如果模型的准确性差，则修改模型或新模型 将被提议。 最终目标是确定以下物质的剂量-反应关系： 指尖载荷与肌腱载荷的比值，以便为手动工具提供指导 设计和工具使用，以最大限度地减少钢筋束载荷，从而降低风险 肌腱相关疾病的风险 这项拟议中的研究是一项合作努力， 加州人体工程学项目（UCSF），手和显微外科（UCSP）， 机械工程（加州大学伯克利分校）和史密斯-凯特尔韦尔眼科研究 院

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.