College of Medicine, University of Saskatchewan, Saskatoon, Canada.
School of Rehabilitation Science, University of Saskatchewan, Saskatoon, Canada.
PM R. 2019 Mar;11(3):270-277. doi: 10.1016/j.pmrj.2018.07.012. Epub 2019 Feb 22.
Ambulatory individuals with incomplete spinal cord injury (iSCI) experience frequent falls suggesting impairments in their balance control. Individuals with iSCI are more stable during normal walking as compared to able-bodied (AB) individuals; however, it is not known whether this increased stability helps prevent hazardous slips.
To compare walking stability during normal walking between iSCI and AB individuals, and to study the association between stability during normal walking and the intensity of an unexpected slip perturbation.
Cross-sectional.
Biomechanics of Balance and Movement lab, University of Saskatchewan, Saskatoon.
Twenty iSCI (15 men; age: M = 60.05, SD = 17.77 years) and 16 (12 men; age: M = 58.92, SD = 17.10 years) AB individuals.
Stability measures during unperturbed walking at a self-selected speed were collected from all the participants. Additionally, stability measures were also collected from 10 of the AB participants walking at a slower speed. An unexpected slip perturbation was recorded in all participants during a self-selected speed trial and peak-slip heel velocity post slip was recorded.
Measures of stability: ankle co-contraction, required coefficient of friction, walking velocity, foot angle, anteroposterior margin of stability, percentage double support, step length, and step width were compared between iSCI, AB-self selected, and AB-slow walking groups. Associations between slip intensity, indicated by peak post-slip heel velocity, and stability measures were also examined through correlation analysis.
Individuals with iSCI walked slower, took shorter steps, and spent a greater percentage of time in double support compared with AB individuals walking at a self-selected pace (P < .01). Slower walking velocity was correlated with slower post-slip velocity in participants with iSCI (P = .01) only.
Individuals with iSCI walk with greater stability than AB individuals during unperturbed walking because of a lower self-selected speed, which appears to reduce the intensity of an unexpected slip perturbation.
III.
不完全性脊髓损伤（iSCI）的门诊患者经常摔倒，表明其平衡控制受损。与健全（AB）个体相比，iSCI 个体在正常行走时更稳定；然而，尚不清楚这种增加的稳定性是否有助于防止危险的滑倒。
比较 iSCI 和 AB 个体在正常行走时的行走稳定性，并研究正常行走时的稳定性与意外滑倒扰动强度之间的关系。
横断面研究。
萨斯喀彻温大学平衡和运动生物力学实验室，萨斯卡通。
20 名 iSCI（15 名男性；年龄：M=60.05，SD=17.77 岁）和 16 名 AB 个体（12 名男性；年龄：M=58.92，SD=17.10 岁）。
从所有参与者中收集未受干扰的行走时的稳定性测量值，以自选择的速度。此外，还从 10 名以较慢速度行走的 AB 参与者中收集了稳定性测量值。在所有参与者的自选择速度试验中记录了意外滑倒扰动，记录了滑倒后的峰值滑脚速度。
稳定性测量值：踝关节协同收缩、所需摩擦系数、行走速度、足角、前后向稳定极限、双支撑百分比、步长和步宽，比较 iSCI、AB-自选择和 AB-慢走组。还通过相关分析研究了滑倒强度（由滑倒后峰值脚速表示）与稳定性测量值之间的关系。
iSCI 个体的行走速度较慢，步幅较短，双支撑时间百分比高于 AB 个体以自选择速度行走（P<.01）。只有 iSCI 参与者的较慢行走速度与滑倒后较慢的速度相关（P=.01）。
iSCI 个体在未受干扰的行走中比 AB 个体具有更大的稳定性，因为他们选择的速度较慢，这似乎降低了意外滑倒扰动的强度。
III。
