Podcast
Questions and Answers
Which combination of bones form the acetabulum?
Which combination of bones form the acetabulum?
- Ilium, ischium, and femur
- Ilium, pubis, and femur
- Ischium, pubis, and sacrum
- Ilium, ischium, and pubis (correct)
During hip flexion in an open kinematic chain, how does the femoral head move within the acetabulum?
During hip flexion in an open kinematic chain, how does the femoral head move within the acetabulum?
- Rolls anteriorly and slides posteriorly (correct)
- Rolls posteriorly and slides posteriorly
- Rolls posteriorly and slides anteriorly
- Rolls anteriorly and slides anteriorly
In the hip joint, the ischiofemoral ligament reinforces which aspect of the joint capsule?
In the hip joint, the ischiofemoral ligament reinforces which aspect of the joint capsule?
- Anterior
- Medial
- Lateral
- Posterior (correct)
Which of the following best describes the arthrokinematics of the femoral head during hip abduction in an open chain movement?
Which of the following best describes the arthrokinematics of the femoral head during hip abduction in an open chain movement?
A patient exhibits a capsular pattern limitation at the hip joint. Which sequence of motion restrictions is most likely?
A patient exhibits a capsular pattern limitation at the hip joint. Which sequence of motion restrictions is most likely?
During medial rotation of the hip, what is the arthrokinematic motion of the femoral head on the acetabulum?
During medial rotation of the hip, what is the arthrokinematic motion of the femoral head on the acetabulum?
Which of the following ligaments primarily reinforces the anterior aspect of the hip joint capsule?
Which of the following ligaments primarily reinforces the anterior aspect of the hip joint capsule?
What osteokinematic motions occur at the hip joint?
What osteokinematic motions occur at the hip joint?
When the hip is adducting in open chain movement, what arthrokinematic motion is the femoral head performing?
When the hip is adducting in open chain movement, what arthrokinematic motion is the femoral head performing?
Flashcards
Iliofemoral Joint
Iliofemoral Joint
The hip joint, connecting the lower extremity to the trunk. It's formed by the ilium, ischium, and pubis, featuring the acetabulum and femoral head.
Hip Osteokinematics
Hip Osteokinematics
Motions include flexion-extension, abduction-adduction, and medial-lateral rotation.
Hip Arthrokinematics
Hip Arthrokinematics
In a non-weight-bearing chain, the femoral head rolls in the same direction and slides in the opposite direction of the femur shaft's movement.
Hip Capsular Pattern
Hip Capsular Pattern
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Study Notes
- The hip joint, or iliofemoral joint, connects the lower extremity to the trunk.
Iliofemoral Joint Structure
- The acetabulum, the proximal joint surface, is formed by the ilium (superiorly), ischium (posteroinferiorly), and pubis (anteroinferiorly).
- The concave acetabulum faces laterally, inferiorly, and anteriorly.
- The acetabular labrum, made of fibrocartilage, deepens the acetabulum.
- The convex head of the femur is the distal joint surface.
- A strong, thick capsule encloses the joint.
- The iliofemoral and pubofemoral ligaments reinforce the capsule anteriorly.
- The ischiofemoral ligament reinforces the capsule posteriorly.
Osteokinematics
- The hip is a synovial ball-and-socket joint with 3 degrees of freedom.
- Motions include flexion-extension, abduction-adduction, and medial-lateral rotation.
- Flexion and extension occur in the sagittal plane around a medial-lateral axis.
- Abduction and adduction occur in the frontal plane around an anterior-posterior axis.
- Medial and lateral rotation occur in the transverse plane around a vertical axis.
- The axis of motion goes through the center of the femoral head.
Arthrokinematics
- In an open kinematic chain (non-weight-bearing), the convex femoral head rolls in the same direction and slides in the opposite direction to the movement of the femoral shaft.
- During flexion, the femoral head rolls anteriorly and slides posteriorly and inferiorly on the acetabulum.
- During extension, the femoral head rolls posteriorly and slides anteriorly and superiorly.
- During medial rotation, the femoral head rolls anteriorly and slides posteriorly on the acetabulum.
- During lateral rotation, the femoral head rolls posteriorly and slides anteriorly.
- During abduction, the femoral head rolls superiorly and slides inferiorly.
- During adduction, the femoral head rolls inferiorly and slides superiorly.
Capsular Pattern
- The capsular pattern involves a marked restriction of medial rotation.
- There are also limitations in flexion and abduction.
- Extension may have a slight limitation.
- Lateral rotation and adduction have little to no limitation.
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