10 Questions
Which term describes the rotation of the pelvis, and often the superimposed trunk, over relatively fixed femurs?
Pelvic-on-femoral hip osteokinematics
Which ligament limits hip abduction and extension, and to a lesser degree, external rotation?
Pubofemoral ligament
Which motion is described by femoral-on-pelvic hip osteokinematics?
Flexion and extension
Which type of joint is the hip joint?
Ball and socket joint
Which ligament limits hip hyperextension?
Iliofemoral ligament
During ipsidirectional lumbopelvic rhythm, what is the relationship between the pelvis and lumbar spine?
They rotate in the same direction
What is the purpose of ipsidirectional lumbopelvic rhythm?
Maximizing the angular displacement of the entire trunk
When is contradirectional lumbopelvic rhythm used?
During walking
What is the sequence of lumbo-pelvic rhythm during trunk extension?
Hip extension, posterior pelvic tilt, extension of lumbar spine
What is the force-couple typically shown between during hip flexion?
Two representative hip flexor muscles
Study Notes
Hip Joint and Movement
- The term "lumbopelvic rhythm" describes the rotation of the pelvis, and often the superimposed trunk, over relatively fixed femurs.
- The iliofemoral ligament limits hip abduction and extension, and to a lesser degree, external rotation.
- Femoral-on-pelvic hip osteokinematics is described by the motion of the femur moving on the pelvis.
- The hip joint is a type of ball-and-socket joint.
Lumbopelvic Rhythm
- During ipsidirectional lumbopelvic rhythm, the pelvis and lumbar spine move together in the same direction.
- The purpose of ipsidirectional lumbopelvic rhythm is to facilitate movement and reduce stress on the lumbar spine.
- Contradirectional lumbopelvic rhythm is used when the pelvis and lumbar spine move in opposite directions, such as during heavy lifting or bending.
- The sequence of lumbo-pelvic rhythm during trunk extension is lumbar spine extension, followed by pelvic rotation.
Hip Flexion
- The force-couple typically shown during hip flexion is between the iliopsoas and the tensor fasciae latae.
Test your knowledge of hip joint ligaments and osteokinematics with this informative quiz. Identify the functions of the iliofemoral, pubofemoral, and ischiofemoral ligaments, and understand the terms related to femoral-on-pelvic hip osteokinematics.
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