The Function of Hamstrings: A Pathogenic Hypothesis of Femoropatellar Osteoarthritis

Blaimont, P; Klein, Paul; Alameh, Mohamad; Elegem, P. Van

doi:10.1007/978-3-642-72782-5_9

Cited by 6 publications

(3 citation statements)

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“…This study did not consider the co-contraction effect of HAM and the quadriceps. Some studies have suggested that the cocontraction effect of HAM and quadriceps muscles is necessary to determine the HAM function [9,10,42]. However, the present study revealed that HAM can act as knee extensors without co-contraction.…”

Section: Discussioncontrasting

confidence: 74%

“…There is a probability that biarticular hamstring muscles (HAM) can compensate for the decreased capacity to generate knee extension. Some researchers have provided the theoretical perspective that HAM can act as knee extensors [9,10]. This theoretical perspective was supported by the ndings of previous studies that showed the counterintuitive function of the biarticular muscles [11][12][13][14].…”

Section: Introductionmentioning

confidence: 89%

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Biarticular Hamstring Muscles Can Act as Knee Extensors – A Computer Simulation Study

Tokunaga

Takabayashi

Inai

et al. 2021

Preprint

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Purpose: It is unclear whether biarticular hamstring muscles (HAM) can act as knee extensors or not. The purpose of this study is to identify the conditions that HAM can act as a knee extensor by using a computational simulation approach.Methods: The modified Gait2392 musculoskeletal model was used in this study. The posture was determined with a hip flexion angle that ranged from -30° to 90° and a knee flexion angle that ranged from -10 ° to 90 °. The simulations were executed under two conditions: all segments are free to move, non-contact with the ground (nCG), and the foot is constrained on the ground, contact with the ground (CG). Induced acceleration analysis was applied to determine the contribution of the HAM to the knee angular acceleration.Results: Three key findings were discovered. 1) HAM can act as knee extensors that have CG condition as well as nCG condition. 2) The HAM function changes depending on the posture. 3) The range of the hip joint that HAM was able to act as a knee extensor was expanded for the CG condition from the nCG condition.Conclusions: We identified the situations in which HAM can act as knee extensors and demonstrated that the HAM function on the knee joint changes depending on the posture and the foot contact condition. Our findings suggest that HAM can be used as compensatory movement strategy for patients with a reduced capacity to generate knee extension if the patients have enough HAM strength.

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Section: Discussioncontrasting

confidence: 74%

Section: Introductionmentioning

confidence: 89%

Biarticular Hamstring Muscles Can Act as Knee Extensors – A Computer Simulation Study

Tokunaga

Takabayashi

Inai

et al. 2021

Preprint

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“…Originally, the hamstrings generated hip extension and knee flexion torque. However, a closed kinetic chain condition causes extension of the knee joint 37 ; therefore, conceivably the hamstrings could function as co-activators in knee extension torque generation. A decrease in force production capability, particularly at the knee joint, is a primary alteration in aging 38 , 39 .…”

Section: Discussionmentioning

confidence: 99%

Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force

Kubota

Yokoyama

Hanawa

et al. 2023

Sci Rep

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We investigated the coordinated activity patterns of muscles based on cosine tuning in the elderly during an isometric force exertion task. We also clarified whether these coordinated activity patterns contribute to the control of hip and knee joint torque and endpoint force as co-activation. Preferred direction (PD) of activity for each muscle in 10 young and 8 older males was calculated from the lower limb muscle activity during isometric force exertion task in various directions. The covariance of endpoint force (η) was calculated from the exerted force data using a force sensor. Relationship between PD and η was used to examine the effect of muscle co-activation on the control of endpoint force. Co-activation between rectus femoris and semitendinosus/biceps femoris increased with changes in muscle PD. Additionally, the η values were significantly low, suggesting that co-activation of multiple muscles may contribute to endpoint force exertion. The mechanism for cooperative muscle activity is determined by the cosine tuning of the PD of each muscle, which affects the generation of hip and knee joint torque and endpoint force exertion. Co-activation of each muscle’s PD changes with age, causing increased muscle co-activation to control torque and force. We demonstrated that co-activation in the elderly is a stabilizer of unsteady joints and a muscle control strategy for cooperative muscle activity.

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Effectiveness of single leg standing up exercise for recovery of knee muscle strength and lower extremity motion function following anterior cruciate ligament reconstruction

Kamiike,

Mori,

Yoshiya

et al. 2023

Journal of Joint Surgery and Research

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The Function of Hamstrings: A Pathogenic Hypothesis of Femoropatellar Osteoarthritis

Cited by 6 publications

References 0 publications

Biarticular Hamstring Muscles Can Act as Knee Extensors – A Computer Simulation Study

Biarticular Hamstring Muscles Can Act as Knee Extensors – A Computer Simulation Study

Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force

Effectiveness of single leg standing up exercise for recovery of knee muscle strength and lower extremity motion function following anterior cruciate ligament reconstruction

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