Department of Mechanical Engineering, University of Alberta, 10-203 Donadeo Innovation Centre for Engineering, 9211 116 Street NW, Edmonton, Alberta T6G 1H9, Canada.
Department of Mechanical Engineering, University of Alberta, 10-203 Donadeo Innovation Centre for Engineering, 9211 116 Street NW, Edmonton, Alberta T6G 1H9, Canada; Department of Biomedical Engineering, University of Alberta, 1098 Research Transition Facility, 8308 114 Street NW, Edmonton, Alberta T6G 2V2, Canada; Glenrose Rehabilitation Hospital, Alberta Health Services, 10230 111 Avenue NW, Edmonton, Alberta T5G 0B7, Canada.
Med Eng Phys. 2019 Nov;73:73-76. doi: 10.1016/j.medengphy.2019.08.004. Epub 2019 Sep 5.
Trunk control has been commonly studied via an unstable sitting paradigm, with the majority of analyses using angular kinematics-based, posturographic measures. However, considerable variability in the choice of kinematics exists. Furthermore, the kinematics capturing the completion of this task are unknown. The purpose of this study was to characterize the kinematics in unstable sitting by quantifying and comparing the angular motion of the base of support, pelvis, and trunk as elicited via a commonly used wobble board (WB) paradigm. WB, pelvis, and trunk motion was recorded in fifteen non-disabled participants sitting on a wobble board. Posturographic measures were calculated and compared between corresponding WB and pelvis, and between WB and trunk angles. The trunk was stabilized through relatively large WB motion, with the trunk adopting a quasi-static pose. For all measures, angles, and conditions, the WB measure values were significantly larger than their corresponding pelvis or trunk values. Our findings demonstrate that the WB-human system is stabilized by regulating WB motion. Future work utilizing an unstable sitting surface and kinematics-based analyses to investigate trunk control should include the analysis of base of support kinematics.
躯干控制通常通过不稳定的坐姿范式进行研究，大多数分析都使用基于角度运动学的姿势描记术测量方法。然而，在运动学的选择上存在相当大的差异。此外，完成这项任务的运动学捕捉方式尚不清楚。本研究的目的是通过量化和比较通过常用的摇摆板（WB）范式引起的支撑基础、骨盆和躯干的角运动，来描述不稳定坐姿中的运动学。在 wobble board 上坐着的 15 名非残疾参与者的 wobble board、骨盆和躯干运动被记录下来。在相应的 WB 和骨盆之间，以及 WB 和躯干角度之间，计算并比较了姿势描记术测量值。通过相对较大的 WB 运动来稳定躯干，使躯干采用准静态姿势。对于所有的测量值、角度和条件，WB 测量值都明显大于其相应的骨盆或躯干值。我们的研究结果表明，WB-人体系统通过调节 WB 运动来稳定。未来使用不稳定坐姿表面和基于运动学的分析来研究躯干控制的工作，应包括对支撑基础运动学的分析。
