论文部分内容阅读
目的 :本研究假设自主运动命令和姿势控制信号间有冲突 ,因此设计在附加重物和不同自主任务的同时给予足底一个模拟受滑的干扰 (横移 )来观察姿势变化并分析其是否受冲突命令或者力学参数的影响。方法 :受试者在执行各种不同的自主任务时 ,随机给予足底支撑面一个左侧或右侧的横移干扰。这些不同的自主任务包括不负重静止站立、静止站立单手负重 5kg、负重 5kg站立并躯干静止侧屈 15°、负重 5kg动态地提重物和放重物 5项任务。测量和分析下列参数 :中心压力的侧位移(COP)、躯干和股部在冠状面上的角位移和腹内压 (IAP)。结果 :干扰离开质量 (向右 )、始反应超射的幅度、达到终平衡的时间和达到平衡前COP位移的次数都增加 ,这种情况可以看作是为了再获得平衡的姿势反应效率降低 ,因此 ,如果质量的重力效果能对抗干扰 ,则再获得平衡的反应效率甚至可以被增进。结论 :提重和负重是危害姿势反应效率的因素 ,因为提重和负重改变了重力效果 ,加大了对躯干的干扰。在动态条件下躯干的运动不是被横移干扰增强就是被横移干扰抵消 ,并没有显著地影响改变最终平衡位置姿势校正的效应。因此附加任务的同时给一个支持面上的横移干扰 ,姿势控制的效应可以被抵消。这个减低的效应可以引起脊柱周围结构的负荷增加和增加
OBJECTIVE: This study assumes that there is a conflict between autonomic motion commands and attitude control signals. Therefore, we design a simulation of slippery interference (traverse) of the plantar with additional weights and different autonomous tasks to observe the change of posture and analyze whether it is affected Impact of conflicting commands or mechanical parameters. METHODS: Subjects randomly assigned a left-hand or right-hand lateral disturbance to the plantar support surface while performing various autonomous tasks. These different autonomous tasks include standing still without weight, standing 5 kg with one hand resting, standing 5 kg and standing still with 15 ° lateral flexion, and 5 kg with dynamic load and weight 5 tasks. The following parameters were measured and analyzed: lateral pressure at the center (COP), angular displacement of the trunk and thigh at the coronal plane and intra-abdominal pressure (IAP). RESULTS: Interfering away from the mass (to the right), the magnitude of the initial response to the over shoot, the time to the final balance, and the number of COP displacements before reaching equilibrium increased, which could be seen as a reduction in the efficiency of the post-equilibrium posture response, Therefore, if the mass-gravitational effect of the mass is able to counteract the interference, the re-equilibrated reaction efficiency can even be improved. Conclusion: Weight lifting and weight bearing are the factors that jeopardize the posture response efficiency, because lifting and weight changing the gravity effect and increasing the disturbance to the torso. Under dynamic conditions, the torso movement is either offset by traversing interference or not by the traversing interference and does not significantly affect the effect of changing posture correction at the final equilibrium position. Therefore, while attaching a task to a traversing disturbance on a supporting surface, the effect of attitude control can be canceled. This reduced effect can cause an increase and increase in the load on the structure around the spine