3D kinematics of the equine metacarpophalangeal joint at walk and trot
3D kinematics of the equine metacarpophalangeal joint at walk and trot
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DOI：
10.1160/vcot-07-01-0011
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发表时间：
2007-01-01
影响因子：
1.3
通讯作者：
Elvin, N.
中科院分区：
文献类型：
--
作者：
Clayton, H. M.;Sha, D.;Elvin, N.
MCP关节及其支撑软组织是运动马常见的损伤部位。马的步态分析主要集中在矢状面的二维分析上，很少有信息描述MCP关节的三维运动及其在损伤发展中的可能作用。目的是表征马MCP关节在步行和小跑期间的3D旋转。使用8台红外摄像机记录了健康马在120 Hz下行走（n = 4）和小跑（n = 6）时，固定在右前肢第三跖骨和近端指骨上的标记三联体的三维轨迹。采用奇异值分解法和空间姿态法计算了MCP关节的螺旋角。屈曲/伸展：步行时62 +/- 7度，小跑时77 +/- 5度；内收/外展：步行时13 +/- 7度，小跑时18 +/- 7度；轴向旋转：步行时6 +/- 3度，小跑时9 +/- 5度。所有马的屈曲/伸展具有一致的模式和幅度，并且似乎与内收/外展相结合，因此站立阶段的伸展伴随着外展，摇摆阶段的屈曲伴随着内收。轴向旋转的量很小，方向在马之间有所不同，但在两种步态的个体内是一致的。
The metacorpopholongeal (MCP) joint and its supporting soft tissues are common sites of injury in athletic horses. Equine gait analysis has focused on 2D analysis in the sagittal plane and little information is available which describes 3D motions of the MCP joint and their possible role in the development of injuries. The aim was to characterize the 3D rotations of the equine MCP joint during walking and trotting. Three-dimensional trajectories of marker triads fixed rigidly to the third metocarpus and proximal phalanx of the right forelimb of healthy horses were recorded at walk (n = 4) and trot (n = 6) at 120 Hz using eight infra-red cameras. Kinematics of the MCP joint were calculated in terms of helical angles between the two segments using singular-value decomposition and spatial attitude methods. The ranges of motion were: flexion/extension: 62 +/- 7 degrees at walk, 77 +/- 5 degrees at trot; adduction/abduction: 13 +/- 7 degrees at walk, 18 +/- 7 degrees at trot; and axial rotation: 6 +/- 3 degrees at walk, 9 +/- 5 degrees at trot. Flexion/extension had a consistent pattern and amplitude in all horses and appeared to be coupled with adduction/abduction, such that stance phase extension was accompanied by abduction and swing phase flexion was accompanied by adduction. Axial rotation was small in amount and the direction varied between horses but was consistent within an individual for the two gaits.