Laboratory of Motor Control and Rehabilitation, Institute of Biomedical Engineering, School of Control Science and Engineering, Shandong University, Jinan, 250061, China.
Department of Physical Medicine and Rehabilitation, Qilu Hospital, Shandong University, Jinan, 250012, China.
Sci Rep. 2020 Feb 3;10(1):1676. doi: 10.1038/s41598-020-58455-z.
The changes of balance control mechanism caused by lumbar disc herniation (LDH) has not been well understood. This study aimed to investigate the effects of LDH on the balance control during standing on sloped surfaces. Ten patients with LDH and 10 gender- and age-matched healthy subjects were instructed to stand quietly on a sloped surface at -5°, 0° or +5°, respectively. The trajectories of the center of pressure (COP) of each individual limb and the full-body were recorded. Cross recurrence quantification analysis (CRQA) was applied to assess the coordination of COP components at the anterior-posterior and medial-lateral directions. The patients with LDH presented magnified inter-limb load asymmetry and had more deterministic components in the COP coordination of the less-affected limb and the full-body than the healthy subjects. The LDH led to decreased dynamical degree of freedom and less flexibility in bidirectional controlling the center of mass simultaneously. The effects of sensorimotor deficits due to LDH could be more obviously exhibited as standing on a declined rather than an inclined surface. This study shed light on the effects of LDH on standing balance control and may facilitate to develop novel strategies for evaluation of LDH.
腰椎间盘突出症（LDH）引起的平衡控制机制变化尚未得到很好的理解。本研究旨在探讨 LDH 对站立在倾斜表面时平衡控制的影响。将 10 名 LDH 患者和 10 名性别和年龄匹配的健康受试者分别指导在-5°、0°或+5°的倾斜表面上安静站立。记录每个个体肢体和整个身体的压力中心（COP）轨迹。应用交叉递归定量分析（CRQA）评估 COP 成分在前-后和内-外侧方向的协调性。与健康受试者相比，LDH 患者表现出更大的肢体间负荷不对称性，并且在受影响较小的肢体和整个身体的 COP 协调中具有更多的确定性成分。LDH 导致双向控制质心的动力学自由度降低，灵活性降低。由于 LDH 导致的感觉运动缺陷的影响在倾斜表面上站立时可能会更加明显。本研究揭示了 LDH 对站立平衡控制的影响，并可能有助于开发用于评估 LDH 的新策略。
