Kinematic Motion Patterns of the Cranial and Caudal Canine Cervical Spine
Kinematic Motion Patterns of the Cranial and Caudal Canine Cervical Spine
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DOI：
10.1111/j.1532-950x.2011.00853.x
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发表时间：
2011-08-01
影响因子：
1.8
通讯作者：
Allen, Matthew J.
中科院分区：
文献类型：
--
作者：
Johnson, Jacqueline A.;da Costa, Ronaldo C.;Allen, Matthew J.
目的：定义犬颈椎的运动模式，特别强调识别颅骨 (C2-C4) 和尾骨 (C5-C7) 节段之间的差异，并确定犬颈椎耦合运动 (CM) 的重要性。研究设计：尸体生物力学研究。样本人群：8 只猎狐犬的颈椎。方法：根据以下标准认为脊柱标本没有病理学：放射线照相、计算机断层扫描和磁共振成像检查。所有肌肉组织均被移除，且未损坏韧带或关节囊。脊柱被安装在定制的纯力矩脊柱测试夹具中，并使用光电运动捕捉系统收集数据。建立了屈曲/伸展、左/右侧弯和左/右轴向旋转的运动范围、中立区和 CM。使用混合效应最大似然回归模型对数据进行分析。结果：总屈曲/伸展在 4 个水平上没有变化。屈曲和伸展之间没有差异，也没有发现 CM。各个层面的侧向弯曲没有差异，但颅骨的侧向弯曲往往更大。尾段的轴向旋转大约为 2.6 倍。侧向弯曲和轴向旋转是耦合的。结论：头颈椎和尾颈椎的运动学明显不同，尾颈椎的活动度更大。
Objective: To define the kinematic motion patterns of the canine cervical spine, with a particular emphasis on identifying differences between the cranial (C2-C4) and caudal (C5-C7)segments, and to determine the significance of coupled motions (CM) in the canine cervical spine.Study Design: Cadaveric biomechanical study.Sample Population: Cervical spines of 8 Foxhounds.Methods: Spinal specimens were considered free of pathology based on radiographic, computed tomography, and magnetic resonance imaging examinations. All musculature was removed without damaging ligaments or joint capsules. Spines were mounted in a customized pure-moment spine testing jig, and data were collected using an optoelectronic motion capture system. Range of motion, neutral zone and CM in flexion/extension, left/right lateral bending and left/right axial rotation were established. Data were analyzed using mixed-effects maximum likelihood regression models.Results: Total flexion/extension did not change across the 4 levels. There was no difference between flexion and extension, and no CM was identified. Lateral bending was not different across levels, but tended to be greater in the cranial spine. Axial rotation was similar to 2.6 times greater in the caudal segments. Lateral bending and axial rotation were coupled.Conclusions: Kinematics of the cranial and caudal cervical spine differed markedly with greater mobility in the caudal cervical spine.