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Updated: Jun 16, 2026

Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder

Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder

Published on: March 4, 2018

How crouch gait can dynamically induce stiff-knee gait.

Marjolein M van der Krogt¹, Daan J J Bregman, Martijn Wisse

¹Department of Rehabilitation Medicine, Research Institute MOVE, VU University Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands. mmvanderkrogt@gmail.com

Annals of Biomedical Engineering

|February 18, 2010

Summary

This summary is machine-generated.

Children with cerebral palsy often exhibit stiff-knee gait due to crouch posture. Our model shows reduced swing knee flexion results from passive dynamics, not just muscle control.

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Area of Science:

Biomechanics
Gait Analysis
Pediatric Rehabilitation

Background:

Children with cerebral palsy (CP) often have stiff-knee gait, characterized by insufficient knee flexion during the swing phase of walking.
This gait abnormality can lead to foot dragging and tripping, impacting mobility and increasing fall risk.
While muscle overactivity is often implicated, the role of passive limb dynamics in stiff-knee gait is less understood.

Purpose of the Study:

To investigate the influence of stance knee flexion (crouch posture) on swing knee flexion using a forward-dynamic simulation model.
To determine if passive dynamics alone can explain the reduced swing knee flexion observed in stiff-knee gait.

Main Methods:

Development of a forward-dynamic computational model of human walking.
Inclusion of a passive swing knee mechanism capable of stable cyclic locomotion.
Systematic variation of the stance knee crouch angle to observe its effect on swing knee flexion.

Main Results:

Increased stance knee crouch angle led to significantly reduced swing knee flexion, mimicking stiff-knee gait.
Reduced swing knee flexion was primarily attributed to altered gravitational moments acting on the knee joint during the swing phase.
While increased push-off strength and hip flexion torque improved swing knee flexion, the effect of stance crouch angle was more dominant.

Conclusions:

Decreased swing knee flexion in children with CP can arise dynamically from a crouched stance posture.
Passive joint mechanics play a crucial role in the manifestation of stiff-knee gait.
These findings suggest that interventions targeting stance posture may be beneficial for improving swing knee motion in CP.