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68 Cards in this Set
- Front
- Back
femur on pelvis is what kind of chain system?
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open chain
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pelvis on femur is what kind of chain system?
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closed chain
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the hip is what kind of joint? and how many degrees of freedom?
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ball and socket
3 degrees of freedom |
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what kind of motions occur at hip joint when the femur is moving on the pelvis?
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1. flex/ext
2. abduction/adduction 3. internal/external rotation (medial/lateral) |
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during flexion and extension what is the motion of the femoral head?
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femoral head spins on pelvic acetabulum
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extension at the hip joint is limited by what?
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twisting of all 3 ligaments
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flexion at the hip joint is limited by what?
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inferior ischiofemoral ligament
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arthrokinematics of hip abduction?
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femoral head rolls superior
slides inferior |
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hip abduction is limited by?
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pubofemoral ligament
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hip adduction is limited by?
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superior ischiofemoral ligament
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arthrokinematics of hip adduction?
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femoral head rolls posterior and
slides superior |
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arthrokinematics of hip medial rotation?
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femoral head rolls anterior and
slides posterior |
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hip medial rotation is limited by?
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superficial ischiofemoral ligament
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arthrokinematics of hip lateral rotation?
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femoral head rolls posterior and
slides anterior |
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hip lateral rotation is limited by?
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iliofemoral ligament
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what motions and around what axis occur at the hip joint when the pelvis moves on the femur?
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1. anterior/ posterior pelvic tilt = mediolateral axis
2. lateral pelvic tilt = a/p axis 3. anterior/ posterior pelvic rotation = vertical axis |
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arthrokinematics of anterior/posterior pelvic tilt?
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pelvic acetabulum spins on femoral head
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arthrokinematics of lateral pelvic tilt = pelvic hike?
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pelvis rolls and slides superiorly
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arthrokinematics of lateral pelvic tilt = pelvic drop?
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pelvis rolls and slides inferiorly
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arthrokinematics of anterior pelvic rotation?
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pelvis rolls and slides anteriorly
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arthrokinematics of posterior pelvic rotation?
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pelvis rolls and slides posteriorly
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loose and close packed positions of the hip joint?
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loose = ~ 30 flexion and ~30 abduction
close = full extension + abd and medial rotation as possible |
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how much of the weight of the upper body can the passive hip tissues support?
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2/3 of upper body weight
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downward forces act on femur from what?
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weight of upper body
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upward forces act on femur from what?
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contact at the knee
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get more flexion at hip when the knee is?
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flexed
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extension range of motion is affected by knee?
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flexion
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hip abduction and adduction can be limited by?
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passive muscle stiffness
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medial/lateral rotation of the hip is measured with the hip at?
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90 degree flexion
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what are the primary hip flexors?
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1. iliopsoas 1
2. rectus femoris 2 3. sartorius 2 4. TFL 1 |
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what are the secondary hip flexors?
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1. pectineus
2. adductor longus 3. adductor magnus 4. gracilis |
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contraction of the hip flexors in a closed chain position would cause?
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anterior pelvic tilt
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contraction of the hip flexors in an open chain sistem would cause?
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hip flexion
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during walking you can find hip flexion?
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beginning of leg swing
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iliopsoas strength is only affected by?
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hip position
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rectus femoris and ~sartorius and TFL strength and flexibility are influenced by?
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hip and knee position
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what are the primary hip extensors? 4
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1. gluteus maximus - 1
2. biceps femoris - 2 3. semitendinosus - 2 4. semimembranosus - 2 |
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what are the secondary hip extensors? 3
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1. gluteus medius
2. adductor magnus 3. piriformis |
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contraction of the hip extensors in a closed chain system would cause?
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posterior pelvic tilt
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contraction of the hip extensors in an open chain system would cause?
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hip extension
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in what phase of gait would you see hip extension?
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propulsion during stance phase
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gluteus maximus is only influenced by?
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hip position
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hamstring strength and flexibility are influenced by?
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hip and knee position
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if a muscle has a line of action anterior to the hip joint axis of rotation it will be a?
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hip flexor
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if a muscle has a line of action posterior to the hip joint axis of rotation it will be a?
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hip extensor
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what are the primary hip abductors?
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1. gluteus medius - 1
2. gluteus maximus - 1 |
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contraction of the hip abductors in a close chain system would cause?
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pelvic hike
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while walking what effect does pelvic hike have?
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stabilizes the frontal plane
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contraction of the hip abductors in an open chain system would cause?
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hip abduction
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when do you see hip abduction during walking?
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at foot placement at the end of swing phase
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what are the primary hip adductors?
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1. pectineus - 1
2. adductor brevis/longus/magnus - 1 3. gracilis - 2 |
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contraction of the hip adductors in a closed chain system would cause?
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pelvic drop
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contraction of the hip adductors in an open chain system would cause?
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hip adduction
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you would see hip adduction during?
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instep kicks
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you would see pelvic drop during?
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lateral raises of the body's weight
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if a muscle has a line of action lateral to the hip joint axis of rotation the muscle will be a?
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hip abductor
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if a muscle has a line of action medial to the hip joint axis of rotation the muscle will be a ?
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hip adductor
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what are the primary hip lateral rotators?
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1. obturator internus/externus
2. gemellus superior/inferior 3. quadratus femoris 4. piriformis all 1 joint ms |
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what are the secondary hip lateral rotators?
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1. gluteus maximus
2. gluteus medius 3. biceps femoris (long head) |
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contraction of the hip lateral rotators in a closed chain system would cause?
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posterior pelvic rotation
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contraction of the hip lateral rotators in an open chain system would cause?
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hip lateral rotation
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when would you see pelvic posterior rotation during running?
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during change of running direction
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what are the hip medial rotators?
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1. gluteus minimus
2. gluteus medius |
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contraction of the hip medial rotators in a close chain system would cause?
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anterior pelvic rotation
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contraction of the hip medial rotators in an open chain system would cause?
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hip medial rotation
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during walking what does pelvic anterior rotation contribute to?
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step length during walking
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if a muscle has a line of action posterior to the hip joint axis of rotation it will be a?
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hip lateral rotator
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if a muscle has a line of action anterior to the hip joint axis of rotation will be a?
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hip medial rotator
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