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The popliteus muscle

R A Mann, J L Hagy

    The Journal of Bone and Joint Surgery. American Volume
    |October 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    The popliteus muscle aids in rotating the tibia internally during walking and specific exercises. This key knee joint action helps stabilize the leg during the stance phase of normal gait.

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    Area of Science:

    • Biomechanics
    • Human Anatomy
    • Kinesiology

    Background:

    • The popliteus muscle's role in knee function is complex and not fully understood.
    • Understanding its precise actions is crucial for diagnosing and treating knee pathologies.

    Purpose of the Study:

    • To investigate the functional role of the popliteus muscle during normal gait.
    • To determine the popliteus muscle's activity during specific knee rotational movements.

    Main Methods:

    • Electromyography was used to record popliteus muscle activity.
    • Muscle activity was analyzed during a normal walking cycle.
    • Popliteus activity was also assessed during planned internal and external tibial rotation exercises.

    Main Results:

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    • Popliteus muscle activity commenced just before heel-strike during normal gait.
    • The muscle remained active for approximately three-quarters of the stance phase.
    • Significant popliteus activity was observed during internal rotation of the tibia on the femur, both during exercises and normal gait.

    Conclusions:

    • The primary function of the popliteus muscle is to initiate and maintain internal rotation of the tibia relative to the femur.
    • This action is vital for stabilizing the knee joint during the stance phase of walking.