3-D DYNAMIC MOTION SEGMENT BEHAVIOR

描述：(改编自调查者摘要)机械功能障碍 腰背部被广泛认为是大腿的重要组成部分 特发性腰痛(LBP)的问题和涉及的异常 脊椎运动(运动节段运动学)和脊椎肌肉的使用和/或 形态学。关于范围的终点已经了解了很多 脊椎运动，但对这些问题的了解和治疗仍然有限 运动学和肌肉异常。 申请者和其他人最近对这些主题的调查表明 那就是：(1)椎骨之间的运动细节非常细腻 在正常受试者中可控和可重复(2)预期之间的联系 出现异常运动和局部肌肉活动异常，以及 (3)部分病例出现局部肌肉形态计量学改变。 特发性LBP。 在这些研究的基础上，拟议工作的具体目标是：1) 每个腰椎运动节段，以测量运动学、肌电和肌肉大小 正常受试者不同运动范围和举重任务中的参数 在被认为可能有异常的特发性LBP受试者中 可通过这些测量检测到；2)测试这些 与临床可用参数的测量结果一致；3)测试 受试者是否可以自愿改变他们的运动节段运动学或肌电 任务执行过程中的行为。

DESCRIPTION: (adapted from Investigator's abstract) Mechanical dysfunction of the low back is widely considered to be an important component of the large problem of idiopathic low back pain (LBP) and to involve abnormalities of vertebral motion (motion segment kinematics) and vertebral muscle use and/or morphology. Much has been learned concerning the end-points of the range of spinal motion but there is still limited understanding and treatment of these kinematic and muscle abnormalities. Recent investigations of these topics by the applicants and others have shown that: (1) the details of the motion between pairs of vertebrae are very finely controlled and repeatable in normal subjects (2) the expected linkage between abnormal motion and abnormal local muscle activity appears to be present, and (3) localized muscle morphometric changes occur in a number of cases of idiopathic LBP. Building on these studies, the proposed work has as its specific aims: 1) for each of the lumbar motion segments, to measure kinematic, EMG, and muscle size parameters during various range of motion and lifting tasks in normal subjects and in idiopathic LBP subjects that are considered likely to have abnormalities detectable by these measurements; 2) to test for correlation of these measurements with those of clinically available parameters; and 3) to test whether subjects can voluntarily alter their motion segment kinematic or EMG behaviors during task performance.