三维运动捕捉技术在颈椎整复手法中肢体运动轨迹的在体研究

In vivo study on the body motion during the Shi's cervical reduction technique with 3D motion capture

目的 :通过三维运动捕捉与分析系统,采集与分析手法运动数据,归纳肩、肘、膝和踝关节运动特点。方法:由1位施术者在头部、躯干、左右肩峰、肘关节内外侧、腕关节内外侧、前臂外侧、上臂外侧、髂前上棘、髂后上棘、股骨大转子、胫骨结节、内外侧膝、腓骨小头、内外侧踝、足跟、双侧大腿、小腿胫骨外侧以及第1、2、5跖骨头、粘贴光标,对1位受试者完成1次颈椎"骨错缝、筋出槽"治疗的右手手法操作周期,重复5次,对施术者右侧肩、肘、膝和踝关节运动轨迹进行捕捉、记录、计算和分析。结果:手法操作过程中4个关节运动轨迹的趋势一致,其中肘关节的离散度最为明显。肩关节和肘关节的三维活动度明显,而膝关节和踝关节相对较小,然而膝关节的屈伸活动明显大于旋转和侧弯活动。结论:石氏伤科颈椎整复手法的上肢关节灵活性较高,而下肢关节的稳定性是重要保证,其中同侧膝关节通过屈伸活动来辅助上肢发力;红外线三维运动捕捉与分析系统建立的手法模型可以为教学和基础研究提供新的研究思路。

Objective：The clinical effect of the Shi’s cervical reduction technique for cervical spondylosis and related disorders has confirmed,however,there were few studies on the body motion during manipulation in vivo study. This study is to summary the law of motion and the motion characteristics of the right operation shoulder,elbow,knee and ankle joints by data acquisition and analysis with the 3D motion capture system. Methods：The markers were pasted on the head,trunk,left and right acromion,elbow joint,wrist joint inner side and the outer side of the inner and the outer side and the lateral upper arm,forearm lateral,anterior superior iliac spine,posterior superior iliac spine,trochanter,femoral and tibial tubercle,inner and outer side of knee,ankle,fibular head,medial and lateral in first,2,5 metatarsal head,heel and dual lateral thigh the calf,lateral tibia of one manipulation practioner,and the subject accepted a complete cycle of cervical ＂Jin Chu Cao and Gu Cuo Feng＂ manipulation which was repeated five times. The movement trajectory of the practioner ’s four markers of operation joints were captured,recorded,calculated and analyzed. Results：The movement trajectories of four joints were consistent,while the elbow joint had the biggest discrete degree. The 3D activities of the shoulder and elbow were more obvious than other two joints,but the degree of flexion and extension in the knee was significantly greater than the rotation and lateral bending. Conclusion：The flexibility of upper limb joint and stability of lower limb joint are the important guarantees for the Shi’s cervical reduction technique,and the right knee facilitated the exerting force of upper limb by the flexion and extension activities. The 3D model built by the motion capture system would provide a new idea for manipulation teaching and further basic biomechanical research.