scholarly journals A Practical Strategy for sEMG-Based Knee Joint Moment Estimation During Gait and Its Validation in Individuals With Cerebral Palsy

2012 ◽  
Vol 59 (5) ◽  
pp. 1480-1487 ◽  
Author(s):  
Suncheol Kwon ◽  
Hyung-Soon Park ◽  
C. J. Stanley ◽  
Jung Kim ◽  
Jonghyun Kim ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Knee Joint ◽  
Joint Moment ◽  
Moment Estimation ◽  
Practical Strategy ◽  
Knee Joint Moment

scholarly journals The Impact of Patellar Tendon Advancement on Knee Joint Moment and Muscle Forces in Patients with Cerebral Palsy

Life ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 944
Author(s):  
Derya Karabulut ◽  
Yunus Ziya Arslan ◽  
Marco Götze ◽  
Sebastian I. Wolf
Keyword(s):  
Cerebral Palsy ◽  
Knee Joint ◽  
Patellar Tendon ◽  
Knee Extensor ◽  
Joint Moment ◽  
Muscle Forces ◽  
Hamstring Muscle ◽  
Crouch Gait ◽  
Knee Joint Moment ◽  
The Impact

Background: Patellar tendon advancement (PTA) is performed for the treatment of crouch gait in patients with cerebral palsy (CP). In this study, we aimed to determine the influence of PTA in the context of single-event multilevel surgery (SEMLS) on knee joint moment and muscle forces through musculoskeletal modeling; Methods: Gait data of children with CP and crouch gait were retrospectively analyzed. Patients were included if they had a SEMLS with a PTA (PTA group, n = 18) and a SEMLS without a PTA (NoPTA group, n = 18). A musculoskeletal model was used to calculate the pre- and postoperative knee joint moments and muscle forces; Results: Knee extensor moment increased in the PTA group postoperatively (p = 0.016), but there was no statistically significant change in the NoPTA group (p > 0.05). The quadriceps muscle forces increased for the PTA group (p = 0.034), while there was no difference in the NoPTA group (p > 0.05). The hamstring muscle forces increased in the PTA group (p = 0.039), while there was no difference in the NoPTA group (p > 0.05); Conclusions: PTA was found to be an effective surgery for the treatment of crouch gait. It contributes to improving knee extensor moment, decreasing knee flexor moment, and enhancing the quadriceps and hamstring muscle forces postoperatively.

The Effect of Foot Progression Angle on Knee Joint Compression Force During Walking

2013 ◽  
Vol 29 (3) ◽  
pp. 329-335 ◽  
Author(s):  
Henrik Koblauch ◽  
Thomas Heilskov-Hansen ◽  
Tine Alkjær ◽  
Erik B. Simonsen ◽  
Marius Henriksen
Keyword(s):  
Knee Joint ◽  
Inverse Dynamics ◽  
Frontal Plane ◽  
Joint Moment ◽  
Compression Force ◽  
Foot Progression Angle ◽  
Infrared Cameras ◽  
Knee Joint Moment ◽  
Joint Loads ◽  
Lateral Load Distribution

It is unclear how rotations of the lower limb affect the knee joint compression forces during walking. Increases in the frontal plane knee moment have been reported when walking with internally rotated feet and a decrease when walking with externally rotated feet. The aim of this study was to investigate the knee joint compressive forces during walking with internal, external and normal foot rotation and to determine if the frontal plane knee joint moment is an adequate surrogate for the compression forces in the medial and lateral knee joint compartments under such gait modifications. Ten healthy males walked at a fixed speed of 4.5 km/h under three conditions: Normal walking, internally rotated and externally rotated. All gait trials were recorded by six infrared cameras. Net joint moments were calculated by 3D inverse dynamics. The results revealed that the medial knee joint compartment compression force increased during external foot rotation and the lateral knee joint compartment compression force increased during internal foot rotation. The increases in joint loads may be a result of increased knee flexion angles. Further, these data suggest that the frontal plane knee joint moment is not a valid surrogate measure for knee joint compression forces but rather indicates the medial-to-lateral load distribution.

scholarly journals Prediction of Knee Joint Moment by Surface Electromyography of the Antagonistic and Agonistic Muscle Pairs

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 82320-82328 ◽  
Author(s):  
Yurong Li ◽  
Qianhui Zhang ◽  
Nianyin Zeng ◽  
Min Du ◽  
Qian Zhang
Keyword(s):  
Knee Joint ◽  
Surface Electromyography ◽  
Joint Moment ◽  
Knee Joint Moment

An Extended Dynamometer Setup to Improve the Accuracy of Knee Joint Moment Assessment

2013 ◽  
Vol 60 (5) ◽  
pp. 1202-1208 ◽  
Author(s):  
A. Van Campen ◽  
F. De Groote ◽  
I. Jonkers ◽  
J. De Schutter
Keyword(s):  
Knee Joint ◽  
Joint Moment ◽  
Knee Joint Moment
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