Korean J Sports Med.  2022 Dec;40(4):217-225. 10.5763/kjsm.2022.40.4.217.

Functional Evaluation Using Center of Pressure between Chronic Ankle Instability and Healthy Control

• Lee DW
• Jeon HG
• Kim BH
• Lee SY
• Kim JS

• KMID: 2536672
• DOI: http://doi.org/10.5763/kjsm.2022.40.4.217

Abstract

Purpose
Mechanical and functional ankle instability or combinations of both can contribute to chronic ankle instability (CAI). Therefore, the purpose of this study was to compare the difference in (1) static and (2) dynamic balance function between patients with CAI and the controls; (3) to investigate association between balance function and CAI; and (4) to examine whether balance assessments are valuable for diagnosing CAI.
Methods
This study was conducted on 40 patients with CAI and 40 ankle healthy individuals. All participants evaluated the Cumberland Ankle Instability Tool questionnaire. Additionally, joint laxity and center of pressure (COP) during static postural control, anterior landing, and lateral landing were measured using an electronic pedobarography.
Results
CAI patients showed a larger COP area than controls when performing static postural control (p=0.023) and lateral landing (p=0.002). As a result of the receiver operation characteristic curve analysis, COP distance, area, and speed during static postural control and COP area during lateral landing showed low accuracy, indicating that they are valuable evaluations for the diagnosis of CAI.
Conclusion
Patients with CAI had poor static and dynamic postural control ability. The static posture control and the lateral landing test had diagnostic significance to evaluate the objective function of CAI.

Keyword

Center of pressure; Chronic ankle instability; Foot scan; Functional test; Pedobarography

Figure

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  Fig. 1 Theoretical models for postural control deficits in patients with chronic ankle instability.

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  Fig. 2 Radiography for stress view. (A) Inversion tilt angle and (B) anterior translation.

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  Fig. 3 Landing task for measuring center of pressure. (A) Posterior to anterior landing and (B) medial to lateral landing.

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  Fig. 4 Center of pressure path in electronic pedobarography. (A) Posterior to anterior landing and (B) medial to lateral landing.

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  Fig. 5 Results of receiver operating characteristic curves evaluating to diagnosis chronic ankle instability. (A) COP traveled distance, (B) ellipse area, and (C) speed during single leg stance, anterior and lateral landing. AUC: area under the curve, COP: center of pressure, SPC: static postural control, PAL: posterior to anterior landing, MLL: medial to lateral landing.

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