Korea Institute of Science and Technology, Seoul.
Korea Photonics Technology Institute, Gwangju.
Hum Factors. 2019 Nov;61(7):1077-1085. doi: 10.1177/0018720819828545. Epub 2019 Mar 5.
Little has been explored about the disparate contribution of medial longitudinal arch (MLA) and lateral longitudinal arch (LLA) to human gait and postural stability. This study aims to investigate the correlation of foot feature parameters including both MLA and LLA with postural stability.
Thirteen young and healthy subjects participated in this study. The newly developed FFMS extracted foot feature parameters in nonweight-bearing (NWB) and weight-bearing (WB) conditions along with postural stability parameters in single-leg-standing (SLS) condition. A bivariate correlation analysis was carried out to investigate the correlation between the foot characteristics and the postural stability parameters.
The foot length and width showed negative correlation with center of pressure (CoP) distance in medio-lateral (ML) and total direction, whereas the foot length in NWB and WB conditions, and the foot width in WB condition showed positive correlation with CoP distance in anterior-posterior (AP) direction. The height of the LLA curve and the area of the MLA were correlated with the postural stability parameters in AP direction. The ratios of the LLA height and area showed moderate correlation with the CoP distance in ML direction and total direction.
The size of a foot, such as the length and width, is correlated with postural stability. Whereas the MLA features are associated with postural stability in AP direction, the LLA features are associated with that in ML and total direction.
The findings suggest that the roles and contributions of the MLA and LLA features in and to the postural control are different.
关于内侧纵弓（MLA）和外侧纵弓（LLA）对人类步态和姿势稳定性的不同贡献，目前研究甚少。本研究旨在探讨包括 MLA 和 LLA 在内的足部特征参数与姿势稳定性的相关性。
13 名年轻健康的受试者参与了这项研究。新开发的 FFMS 在非负重（NWB）和负重（WB）条件下提取足部特征参数，以及单腿站立（SLS）条件下的姿势稳定性参数。进行了双变量相关分析，以研究足部特征与姿势稳定性参数之间的相关性。
足部长度和宽度与中-侧（ML）和总方向的压力中心（CoP）距离呈负相关，而 NWB 和 WB 条件下的足部长度以及 WB 条件下的足部宽度与 AP 方向的 CoP 距离呈正相关。LLA 曲线的高度和 MLA 的面积与 AP 方向的姿势稳定性参数相关。LLA 高度和面积的比值与 ML 方向和总方向的 CoP 距离呈中度相关。
足部的大小，如长度和宽度，与姿势稳定性相关。而 MLA 特征与 AP 方向的姿势稳定性相关，LLA 特征与 ML 和总方向的姿势稳定性相关。
研究结果表明，MLA 和 LLA 特征在姿势控制中的作用和贡献不同。
