Ground-Reaction-Force-Based Gait Analysis and Its Application to Gait Disorder Assessment: New Indices for...

Area of Science:

• Biomechanics
• Neurology
• Medical Engineering

Background:

• Gait assessment is crucial for identifying gait disorders.
• Current heel-contact-event-based gait analysis methods have high error rates.
• There is a need for more objective gait disorder assessment techniques.

Purpose of the Study:

• To overcome limitations of existing gait analysis techniques.
• To develop objective indices for assessing gait disorders.
• To propose a novel method for gait disorder assessment using center of pressure (COP) data.

Main Methods:

• Observed changes in the medial-lateral center of pressure (COPx) during the gait cycle.
• Developed a gait cycle estimation method using COPx data.
• Created a polar gaitogram using gait cycle and COPx data.
• Proposed the area ratio index (ARI) and a tangential line slope as new gait analysis indices.

Main Results:

• The proposed polar gaitogram and indices successfully differentiated between stroke patients and healthy adults.
• The findings demonstrated the potential of the new method for objective gait disorder assessment.
• The study validated the effectiveness of the ARI and tangential slope indices.

Conclusions:

• The novel polar gaitogram and derived indices offer a promising, objective approach to gait disorder assessment.
• These methods can potentially be integrated into wearable devices for practical gait analysis.
• The study highlights a significant advancement in the objective evaluation of gait disorders.