A kinematic model to assess spinal motion during walking
A kinematic model to assess spinal motion during walking
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DOI：
10.1097/01.brs.0000245939.97637.ae
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发表时间：
2006-11-15
期刊：
影响因子：
3
通讯作者：
Ondra, Stephen L.
中科院分区：
文献类型：
--
作者：
Konz, Regina J.;Fatone, Stefania;Ondra, Stephen L.
研究设计和目的。建立了一个三维多节段脊柱运动学模型，用于对行走过程中脊柱运动进行无创分析。利用该模型收集健全步行车的初步数据并进行分析。背景资料摘要。脊柱在行走过程中的作用和手术脊柱稳定对步态的影响都没有得到充分的了解。通常，步态分析模型完全忽略脊柱或将其视为单一刚性结构。与行走相关的局部脊柱运动和下肢数据的数据很少。使用KinTrak软件（Motion Analysis Corp., Santa Rosa， CA）创建生物力学模型，用于分析三维区域脊柱运动。从力学模型中测量已知角度，并将其与计算角度进行比较，验证了运动学模型。研究人员收集了10名身体健全的成年人以5种自行选择的速度行走的脊柱运动数据。这些结果与文献中报道的数据进行了比较。在力学模型上测得的单轴角与计算的运动学模型角相差不超过5，耦合角相差不超过2。用该模型计算的身体健全受试者的局部脊柱运动学与其他作者报道的数据进行了比较。一个多节段的脊柱运动学模型已经开发和验证了脊柱运动的分析在行走。通过了解脊柱在行走中的作用以及脊柱运动与下肢运动之间的因果关系，可以增强术前计划，以恢复正常的对齐和平衡，同时将对行走的负面影响降到最低。
Study Design and Objectives. A 3-dimensional multi-segment kinematic spine model was developed for non-invasive analysis of spinal motion during walking. Preliminary data from able-bodied ambulators were collected and analyzed using the model.Summary of Background Data. Neither the spine's role during walking nor the effect of surgical spinal stabilization on gait is fully understood. Typically, gait analysis models disregard the spine entirely or regard it as a single rigid structure. Data on regional spinal movements, in conjunction with lower limb data, associated with walking are scarce.Methods. KinTrak software ( Motion Analysis Corp., Santa Rosa, CA) was used to create a biomechanical model for analysis of 3-dimensional regional spinal movements. Measuring known angles from a mechanical model and comparing them to the calculated angles validated the kinematic model. Spine motion data were collected from 10 able- bodied adults walking at 5 self-selected speeds. These results were compared to data reported in the literature.Results. The uniaxial angles measured on the mechanical model were within 5 of the calculated kinematic model angles, and the coupled angles were within 2. Regional spine kinematics from able- bodied subjects calculated with this model compared well to data reported by other authors.Conclusions. A multi-segment kinematic spine model has been developed and validated for analysis of spinal motion during walking. By understanding the spine's role during ambulation and the cause-and-effect relationship between spine motion and lower limb motion, preoperative planning may be augmented to restore normal alignment and balance with minimal negative effects on walking.