COMPARISON OF LOWER LIMB 3D KINEMATIC OUTCOMES BETWEEN MARKER-BASED AND MARKERLESS MOTION CAPTURE SYSTEM DURING OVERGROUND WALKING IN AMBULATORY CHILDREN WITH CEREBRAL PALSY (CP)
Presenter Type
UNO Graduate Student (Doctoral)
Major/Field of Study
Biomechanics
Author ORCID Identifier
ORCID : 0000-0002-2921-565X
Advisor Information
Assistant Professor
Location
MBSC306 - G (Doctoral)
Presentation Type
Oral Presentation
Start Date
24-3-2023 10:30 AM
End Date
24-3-2023 11:45 AM
Abstract
Children with cerebral palsy (CP) have difficulties walking due to bone deformity, stiff joints, muscle tightness, and balance issues. Measuring joint movements can help identify problems essential for clinicians to make treatment and surgical plans. Traditional motion capture technologies use markers placed on specific locations of the body to track joint motion. A new technology, a markerless system, uses color videos to record movements and relies on software that recognizes human features. This new markerless system is easier to use, faster to collect movement data, and less expensive to operate. However, markerless technology has not proven its accuracy and reliability in measuring joint angles in children with CP.
This study tested how different marker-based and markerless are in measuring the ankle, knee, and hip joint angles during walking. Five children with CP walked at their comfort speed to collect motion data. The two systems were synchronized and recorded the data at the same time. A total of 10 strides per participant were used to display motion during a walking cycle. These data were analyzed to determine differences between the two systems. Moreover, for every 5% of the walking cycle, we examined the average difference and correlation between the two systems to establish how markerless was performing.
We found that the greatest peak difference in measuring joint angles at the hip, while the two systems were most alike in measuring knee joint angle. Moreover, the ankle joint was the most different overall. Findings from this study are similar to previous work conducted on healthy adults. Although the differences between the two systems were found, the markerless motion capture system could potentially be used as an alternative to collect joint movement in children with CP.
Scheduling
10:45 a.m.-Noon, 2:30 -3:45 p.m.
COMPARISON OF LOWER LIMB 3D KINEMATIC OUTCOMES BETWEEN MARKER-BASED AND MARKERLESS MOTION CAPTURE SYSTEM DURING OVERGROUND WALKING IN AMBULATORY CHILDREN WITH CEREBRAL PALSY (CP)
MBSC306 - G (Doctoral)
Children with cerebral palsy (CP) have difficulties walking due to bone deformity, stiff joints, muscle tightness, and balance issues. Measuring joint movements can help identify problems essential for clinicians to make treatment and surgical plans. Traditional motion capture technologies use markers placed on specific locations of the body to track joint motion. A new technology, a markerless system, uses color videos to record movements and relies on software that recognizes human features. This new markerless system is easier to use, faster to collect movement data, and less expensive to operate. However, markerless technology has not proven its accuracy and reliability in measuring joint angles in children with CP.
This study tested how different marker-based and markerless are in measuring the ankle, knee, and hip joint angles during walking. Five children with CP walked at their comfort speed to collect motion data. The two systems were synchronized and recorded the data at the same time. A total of 10 strides per participant were used to display motion during a walking cycle. These data were analyzed to determine differences between the two systems. Moreover, for every 5% of the walking cycle, we examined the average difference and correlation between the two systems to establish how markerless was performing.
We found that the greatest peak difference in measuring joint angles at the hip, while the two systems were most alike in measuring knee joint angle. Moreover, the ankle joint was the most different overall. Findings from this study are similar to previous work conducted on healthy adults. Although the differences between the two systems were found, the markerless motion capture system could potentially be used as an alternative to collect joint movement in children with CP.