Biomechanics of the Hip Flashcards

1
Q

Biomechanics

Compensatory optimization of muscular pull at the hip causes those with femoral anteversion to toe (in or out) during gait.

Hip

A

In

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2
Q

Biomechanics

Which tissues are taught during hip flexion with the knee extended?

Hip

A

Hamstrings

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3
Q

Biomechanics

Which tissues are taught during hip flexion with the knee flexed?

Hip

A
  • Gluteals
  • Capsule
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4
Q

Biomechanics

Which tissues are taught with the hip extended and the knee extended?

Hip

A
  • Iliofemoral Ligament
  • Pubofemoral Ligament
  • Ischiofemoral Ligament
  • Iliopsoas
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5
Q

Biomechanics

Which tissues are taught with the hip extended and the knee flexed?

Hip

A
  • Rectus Femoris
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6
Q

Biomechanics

What is the ligamentous close-packed position of the hip?

Hip

A

Extension, Internal Rotation, and Abduction

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7
Q

Biomechanics

What is the bony close-packed position of the hip?

Hip

A

Flexion, External Rotation, and Abduction

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8
Q

Biomechanics

What type of arthrokinematic movement occurs at the hip joint during flexion and extension?

Hip

A

Spin

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9
Q

Biomechanics

What type of arthrokinematic movement occurs at the hip joint during Abduction?

Hip

A

Superior Roll
Inferior Glide

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10
Q

Biomechanics

What type of arthrokinematic movement occurs at the hip joint during Internal Rotation?

Hip

A

Anterior Roll
Posterior Glide

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11
Q

Biomechanics

What type of arthrokinematic movement occurs at the hip joint during External Rotation?

Hip

A

Posterior Roll
Anterior Glide

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12
Q

Biomechanics

Compare and contrast angle of inclination vs angle of torsion.

Hip

A

Angle of Inclination: an angle in the frontal plane between the femoral neck and medial side of femoral shaft
Angle of Torsion: relative rotation between the bone’s shaft and neck (15 degrees of anteversion is optimal)

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13
Q

Biomechanics

What is the difference between the trendelenburg sign and the compensated trendelenburg sign.

Hip

A

Trendelenburg: Insufficient hip abduction is unable to control the inferior movement of the center of mass during stance. This results in rapid and poorly controlled hip adduction and contralateral pelvic drop.
Compensated Trendelenburg: An anticipatory lateral shift of the center of mass towards the side of insufficient hip abduction lessens the demand on this weakned area.

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