COORDINATION OF SITTING UP

由疾病引起的轴向运动协调障碍，例如 帕金森病，多发性硬化症，小脑变性， 可能会导致摔倒和受伤。尽管这些赤字是 常见的是，对轴向电机的协调知之甚少。 拟议中的项目将研究中枢神经系统如何 (CNS)通过使用“仰卧起坐”协调轴向运动 行为模型。 中枢神经系统使用复杂的轴向电机协调模式来产生 导致坐起的一系列动作。这一序列 行动需要对时间和强度进行精确的监管 一年中大量主要肌群的肌肉活动 身体的大部分。的顺序激活模式 肌肉暗示本体感觉输入在协调中的作用 坐起来的感觉。 神经学上正常的人类受试者会从仰卧中坐起来 位置。在仰卧起坐中，三分之二的体重在头部和 后备箱必须被抬起，由于这种重量分配， 坐起来不能作为同时运动的 整个上半身。相反，它必须按以下顺序执行 较小的身体抬起，从头部开始，向 臀部。 将使用各种机械干预来探索 肌肉活动模式与运动能力的关系 运动的动力学和运动学。不同关节的运动 会受到约束，体重分布也会发生变化 以不同的速度进行仰卧起坐。垂直力 在支撑面上产生的数据将与分段记录在一起 运动学和肌肉(EMG)活动。

Axial motor deficits in coordination caused by diseases, such as Parkinson disease, multiple sclerosis, and cerebellar degeneration, can contribute to falls and injuries. Although these deficits are common, relatively little is known about axial motor coordination. The proposed project will investigate how the central nervous system (CNS) coordinates axial movement by using the "sit-up" as a behavioral model. The CNS uses a complex pattern of axial motor coordination to produce the sequence of actions leading to sitting up. This sequence of actions requires precise regulation of the timing and intensity muscle activity in a large number of major muscle groups across a large part of the body. The sequential activation patterns of muscles suggests a role for proprioceptive input in the coordination of sitting up. Neurologically normal human subjects will sit up from a supine position. In sit-ups, two-thirds of the body weight in head and trunk must be lifted, and because of this weight distribution, sitting up cannot be accomplished as a simultaneous movement of the entire upper body. Instead, it must be performed as a sequence of smaller body lifts, beginning with the head and moving towards the hips. A variety of mechanical interventions will be used to explore the relationships between the patterns of muscle activity and the dynamics and kinematics of movement. Movement at different joints will be constrained, and the body weight distribution will be changed for sit-ups performed at different speeds. The vertical forces produced on the support surface will be recorded along with segmental kinematics and muscle (EMG) activity.