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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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Related Experiment Video

Updated: May 9, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

System identification of human ankle dynamics: intersubject variability and intrasubject reliability.

R E Kearney¹, P L Weiss, R Morier

¹Department of Biomedical Engineering, McGill University, Montréal, Canada.

Clinical Biomechanics (Bristol, Avon)

|August 7, 2013

Summary

Quantitative measures of normal human ankle mechanics show high intrasubject reliability, comparable to or better than clinical methods. Intersubject variability is slightly larger, similar to clinical measures.

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Area of Science:

Biomechanics
Human physiology
Orthopedics

Background:

Understanding normal human ankle mechanics is crucial for diagnosing and treating musculoskeletal disorders.
Quantitative measures offer objective assessments of joint function.
Assessing the reliability and variability of these measures is essential for clinical application.

Purpose of the Study:

To evaluate the intrasubject reliability and intersubject variability of quantitative measures of normal human ankle mechanics.
To compare the reliability and variability of quantitative measures with those used in clinical practice.

Main Methods:

Fifteen young adults participated in the study.
Each subject underwent two examination sessions.
Passive and active joint dynamics, including position-stiffness and torque-stiffness relations, were characterized.
Quantitative, objective joint property measures were taken for comparison with clinical methods.

Main Results:

Measures of passive and active joint dynamics demonstrated high intrasubject reliability.
The reliability of quantitative measures was generally found to be as good as or better than most clinical measures.
Intersubject variability for quantitative measures was slightly larger than intrasubject reliability, consistent with clinical measures.

Conclusions:

Quantitative measures of normal human ankle mechanics exhibit good to excellent intrasubject reliability.
These objective measures provide a reliable basis for assessing ankle function.
The findings support the use of quantitative measures in clinical settings for evaluating ankle mechanics.