In vivo primary and coupled segmental motions of the healthy female head-neck complex during dynamic head axial rotation.
In vivo primary and coupled segmental motions of the healthy female head-neck complex during dynamic head axial rotation.
复制标题
在动态头部轴向旋转过程中健康女性头颈复合体的体内主要和耦合节段运动。
DOI：
10.1016/j.jbiomech.2021.110513
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发表时间：
2021-06-23
影响因子：
2.4
通讯作者：
Cha T
中科院分区：
文献类型：
--
作者：
Guo R;Zhou C;Wang C;Tsai TY;Yu Y;Wang W;Li G;Cha T
虽然之前的研究极大地提高了我们对颈椎运动能力的认识，但很少报道头部在直立姿势动态活动期间整个头颈复合体（C0-T1）的运动学。本研究使用双荧光成像系统和 3D 到 2D 配准技术，研究了 8 名女性无症状受试者在动态左右头部轴向旋转期间整个头颈复合体 (C0-T1) 的体内运动学。在单侧头部旋转（即向左或向右头部旋转）期间，整体头颈复合体（C0-T1）的初级旋转达到55.5±10.8°，上颈椎区域（C0-2）的初级轴旋转为39.7±9.6°（整体C0-T1轴旋转的71.3±8.5%），下颈椎区域（C2-T1）的初级轴旋转为39.7±9.6°（占整体C0-T1轴旋转的71.3±8.5%）。主旋转 10.0 ± 3.7°（整体 C0-T1 轴向旋转的 18.6 ± 7.2%）。上、下颈椎区域发生耦合弯曲旋转，幅度相似但方向相反（上：对侧弯曲18.2±5.9°，下：同侧弯曲21.4±5.1°），导致补偿性颈椎侧曲，平衡头部水平旋转。此外，上颈段（C0-1 或 C1-2）提供头部轴向旋转所需的不同旋转自由度的主要活动性。此外，我们通过与头颈复合体的整体初级轴向旋转的相关性定量描述了耦合节段运动（屈曲-伸展和侧向弯曲）。这项研究提供了关于头轴旋转过程中颅颈段的主要运动和耦合运动的全面基线数据。
While previous studies have greatly improved our knowledge on the motion capability of the cervical spine, few reported on the kinematics of the entire head-neck complex (C0-T1) during dynamic activities of the head in the upright posture. This study investigated in vivo kinematics of the entire head- neck complex (C0-T1) of eight female asymptomatic subjects during dynamic left-right head axial rotation using a dual fluoroscopic imaging system and 3D-to-2D registration techniques. During one-sided head rotation (i.e., left or right head rotation), the primary rotation of the overall head-neck complex (C0-T1) reached 55.5 ± 10.8°, the upper cervical spine region (C0–2) had a primary axial rotation of 39.7 ± 9.6° (71.3 ± 8.5% of the overall C0-T1 axial rotation), and the lower cervical spine region (C2-T1) had a primary rotation of 10.0 ± 3.7° (18.6 ± 7.2% of the overall C0-T1 axial rotation). Coupled bending rotations occurred in the upper and lower cervical spine regions in similar magnitude but opposite directions (upper: contralateral bending of 18.2±5.9° versus lower: ipsilateral bending of 21.4±5.1°), resulting in a compensatory cervical lateral curvature that balances the head to rotate horizontally. Furthermore, upper cervical segments (C0–1 or C1–2) provided main mobility in different rotational degrees of freedom needed for head axial rotations. Additionally, we quantitatively described both coupled segmental motions (flexion-extension and lateral bending) by correlation with the overall primary axial rotation of the head-neck complex. This investigation offers comprehensive baseline data regarding primary and coupled motions of craniocervical segments during head axial rotation.
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通讯作者：
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