Related Experiment Video
Updated: Aug 19, 2025
07:52
Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
8.5K
Ankle joint contact force profiles differ between those with and without chronic ankle instability during walking.
1MOTION Science Institute, Department of Exercise & Sport Science, University of North Carolina at Chapel Hill, NC, USA.
Gait & Posture
|December 2, 2022
Summary
Individuals with chronic ankle instability (CAI) show altered ankle joint loading patterns during walking. They experience lower compressive forces but higher shear forces, potentially impacting joint health.
Area of Science:
- Biomechanics
- Orthopedics
- Sports Medicine
Background:
- Chronic ankle instability (CAI) is linked to abnormal gait mechanics.
- Altered biomechanics may lead to early ankle joint degeneration.
- Joint contact forces (JCF) can estimate joint loading non-invasively.
Purpose of the Study:
- To compare ankle JCF profiles during walking in individuals with and without CAI.
- To investigate differences in compressive and shear JCF during the stance phase.
Main Methods:
- Gait assessment of 10 individuals with CAI and 10 controls on an instrumented treadmill.
- Musculoskeletal modeling used to estimate ankle JCF (compressive, anteroposterior shear, mediolateral shear).
- Analysis of peak, impulse, and loading rates for JCF variables.
Main Results:
- Individuals with CAI exhibited significantly different JCF compared to controls across all directions.
- CAI group showed lower compressive force peaks and impulse.
- CAI group demonstrated higher anteroposterior and mediolateral shear forces.
Conclusions:
- Individuals with CAI display distinct ankle joint loading patterns during walking.
- Differences in JCF are direction-dependent, varying with the axis of movement.
- Findings highlight altered joint loading in CAI, relevant for understanding post-traumatic osteoarthritis.
Related Concept Videos
01:10Ankle Joint
1.7K
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...
1.7K
01:23Knee Joint
2.1K
The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
2.1K
01:10Bones of the Lower Limb: Tibia and Fibula
4.4K
The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
4.4K