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Ankle Joint

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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Updated: Nov 5, 2025

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Current perception threshold testing in chronic ankle instability.

Ran Zhang^1,2, Xi Zhang², Yaping Chen³

¹Department of Rehabilitation, Xuanwu Hospital, Capital Medical University, 45 Changchunjie, Beijing, 100054, China.

BMC Musculoskeletal Disorders

|May 19, 2021

Summary

This summary is machine-generated.

Chronic ankle instability (CAI) is linked to sensory nerve damage. Patients with CAI exhibit elevated sensory thresholds in both ankles, suggesting nerve fiber dysfunction, particularly at 250-Hz and 5-Hz frequencies.

Keywords:

Chronic ankle instability Current perception threshold Sensory nerve function

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Area of Science:

Neuroscience
Orthopedics
Sports Medicine

Background:

Chronic ankle instability (CAI) is often associated with impaired sensory input.
Evaluating sensory nerve function is crucial for understanding CAI pathology.

Purpose of the Study:

To quantitatively assess sensory nerve function in individuals with CAI using current perception threshold (CPT) measurements.
To investigate the influence of sex, age, and BMI on CPT values in CAI patients.
To explore correlations between CPT values at different frequencies.

Main Methods:

A case-control study involving 59 CAI patients and 30 healthy controls.
CPT measurements were taken at the anterior talofibular ligament region.
Statistical analyses compared CPT values between groups and evaluated demographic influences and frequency correlations.

Main Results:

CAI patients demonstrated significantly higher CPT values at 250-Hz and 5-Hz stimuli compared to controls.
No significant differences in CPT were observed at 2000-Hz stimuli.
CPT values did not significantly correlate with sex, age, or BMI, but showed correlations between frequencies, especially 250-Hz and 5-Hz.

Conclusions:

Individuals with CAI exhibit heightened sensory thresholds in both injured and uninjured ankles, potentially indicating A-delta and C fiber dysfunction.
Sex, age, and BMI were not found to be significant factors influencing CPT values.
Significant correlations exist between CPT values across different frequencies, particularly between 250-Hz and 5-Hz.