人体仰卧位侧翻的动力学仿真及实验验证

Dynamic simulation and experimental verification of human body turning over in supine position

仰卧位侧翻是预防长期卧床患者发生压疮的有效措施之一,对其进行动力学研究具有重要意义。基于解剖学理论,建立人体的动力学模型并进行平躺姿态、屈单膝姿态和侧抬单侧上下肢姿态三种常见仰卧位侧翻姿态的动力学仿真,得到三种姿态下侧翻时以胸部力、腰部力和大腿力为代表的驱动力的变化情况。为验证仿真的有效性,进行人体仰卧位侧翻的肌电力测量实验,得到与仿真胸部、腰部和大腿位置接近的胸大肌、腹外斜肌和大腿肌的肌电测量值。实验结果显示实验数据和仿真数据在范围和变化趋势方面一致。面向仰卧位侧翻的动力学仿真及实验研究结果,综合评价了三种姿态下的仰卧位侧翻运动中各个肌肉力的变化,对于人体侧翻运动机制的研究具有重要的意义。

The tilted supine position has been evaluated to be one of the significantly effective approaches to prevent bedsore of the patients in the bedridden state. Thus, it has deeply positive influences that in view of dynamics this study explores how the position works. Based on the anatomical theories, this study formulates the human dynamic model. Furthermore, the dynamic simulation of three usual postures in tilted supine position including lying on back, lying with one knee bent and lying with the upper and lower limb on one side lifted is carried out. Therefore,the changes of the three driving forces named as chest force, waist force and thigh force in the tilted supine position can be observed. In order to verify the validity of this simulation, this study obtains the electromyogram measurements of ectopectoralis, external obliques and thigh muscles which are respectively close to the chest, waist and thigh by conducting the human force measurements experiment. The result revealed that in terms of range and trend, the experimental data and simulation’s data were consistent. In conclusion, the changes of these muscles in the supine position movements are researched efficiently by both this experiment and the dynamic simulation. Besides, the result is crucially key to find the mechanism of human’s tilted supine position movements.