Biomech-Hip-Lecture

Biomech-Hip-Lecture - F m is the force from the hip...

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The Hip Introduction to Biomechanics 14:125:208
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The hip is another example of a ball and socket As a ball and socket joint the hip experiences moments about all three axes and forces from all three axes M X , M Y , M Z F X , F Y , F Z
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Anatomy Bones of the hip joint Acetabulum Femoral Head Greater Trochanter Lesser Trochanter
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Non-bone portions of the hip
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Ligaments of the hip
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Muscles of the hip Posterior Anterior
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Flexors and Extensors F F F E Anterior Posterior
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Hip Muscles The Gluteus medius and minimus abduct the thigh
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Hip muscles The adductor longus, adductor magnus, and adductor hiatus are responsible for leg adduction
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Forces at the Hip Forces at the hip
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Unformatted text preview: F m is the force from the hip abductor muscles Forces at the Hip Hip joint reaction forces during one legged stance What do we know? Body weight, location of COM, Weight of one leg and location of legs COM, insertion points of abducter muscles (direction of muscle force, but not magnitude) What we dont know? Magnitude of muscle force, Reaction at hip joint. Forces in X and Y directions, but no moments. Forces at the Hip Joint reaction forces in the hip One-legged stance 3 unknowns F m , F jx , F jy Forces at the Hip ) sin ( cos ) ( cos ) ( 1 1 a a W W a bW cW F m...
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Biomech-Hip-Lecture - F m is the force from the hip...

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