Study on neuromuscular control characteristics of ankle in patients with chronic ankle instability in stance phase of gait
10.3969/j.issn.1001-1242.2025.04.012
- VernacularTitle:慢性踝关节不稳步态支撑期踝周神经肌肉控制特征研究
- Author:
Piming GAO
1
;
Xiaobing LUO
1
;
Yaming YU
1
Author Information
1. 四川省骨科医院运动医学科、治未病中心,四川省成都市,610041
- Publication Type:Journal Article
- Keywords:
surface electromyography;
chronic ankle instability;
gait;
ankle;
neuromuscular control
- From:
Chinese Journal of Rehabilitation Medicine
2025;40(4):555-560
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the neuromuscular control characteristics of ankle muscles of patients with chronic ankle instability(CAI)in different phases of stance,in order to provide reference for function evaluation and interven-tion of CAI.Method:CAI patients were collected according to the inclusion and exclusion criteria and matched with healthy individuals based on age,height,weight and sex.Surface electromyography was used to detect the electromyographic activity of the tibialis anterior,peroneus longus,gastrocnemius medialis and lateralis in all subjects during barefoot walking at a self-selected speed.Result:Compare with the control group,the mean normalized root mean square(RMS)value and co-contrac-tion index of peroneus longus in CAI patients were significantly reduced from middle-stance to heel-off(P＜0.05).The normalized RMS of gastrocnemius medialis was significantly increased from heel-off to toe-off(P＜0.05).The co-contraction indexes of tibialis anterior(P＜0.01)and gastrocnemius lateralis(P＜0.05)was signif-icantly decreased from heel-strike to foot flat.Conclusion:In CAI patients during walking,the neuromuscular control of the peroneus longus is reduced from middle-stance to heel-off,and the neuromuscular activation of the gastrocnemius medialis was increased from heel-off to toe-off,while the neuromuscular control of tibialis anterior and gastrocnemius lateralis is sufficient from heel-strike to foot-flat.These abnormalities will affect the posture and movement of foot-ankle at the cor-responding gait phase and increase the risk of ankle sprain.
