MS1 Exam 2
What are the anterior ligaments that limit/resists extension and ER? - CORRECT
ANSWER-Iliofemoral ligament
-Y or V shaped
-strongest ligament in the human body
Pubofemoral ligament
What is the posterior ligament that limits/resists extension and IR? - CORRECT
ANSWER-Ischiofemoral ligament
What is the ligament of Bigelow? - CORRECT ANSWER-iliofemoral ligament
When are the iliofemoral, pubofemoral, and ischiofemoral ligaments taut? -
CORRECT ANSWER--during hip extension and slight ER
_during hip extension and abduction
-during hip extension and IR
What are the arthrokinematics of hip flexion? - CORRECT ANSWER-Roll
anterior, Glide posterior/inferior
What are the arthrokinematics of hip extension? - CORRECT ANSWER-Roll
posterior, glide anterior
What are the arthrokinematics of hip abduction? - CORRECT ANSWER-Roll
laterally, glide medially
What are the arthrokinematics of hip adduction? - CORRECT ANSWER-Roll
medially, glide laterally/superiorly
Arhtrokinematics of hip medial rotation? - CORRECT ANSWER-Roll anterior,
glide posterior
arthrokinematics of hip lateral rotation? - CORRECT ANSWER-Roll posterior,
glide anterior
, What happens to the moment arm if coxa valga is present? - CORRECT
ANSWER--Decreases shear to neck (positive)
-Decreases MA of abductors requiring greater force and increased JRF
(negative)
-positioned more lateral on acetabulum, possibly favoring dislocation
What happens to the moment arm if coxa vara is present? - CORRECT
ANSWER-Increases MA of abductors, but increases shear to femoral neck (risk
of Epiphyseal plate shearing=Slipped Capital Femoral Epiphysis)
-may cause fracture of the femoral neck)
Where does the line of gravity run through the femur? - CORRECT
ANSWER-Greater trochanter
What is considered a pathologic angle of anteversion? - CORRECT
ANSWER--Increased angle >15 degrees
-"KNOCK-KNEES"
What is considered a pathologic angle of retroversion? - CORRECT
ANSWER--decreased angle <8 degrees
-"TOE-OUT"
In what direction does the menisci glide in knee flexion and extension? -
CORRECT ANSWER-Flexion: glide posteriorly
Extension: glide anteriorly
Knee joint arthrokinematics: Flexion
OKC & CKC - CORRECT ANSWER-OKC (concave on convex) Tibia rolls and
glides posteriorly on femur
CKC (convex on concave) Femoral condyles roll posteriorly and glide anteriorly
on the tibia
Knee joint arthrokinematics: Extension
OKC & CKC - CORRECT ANSWER-OKC: Tibia rolls and glides anteriorly on the
femur
CKC: Femoral condyles roll anteriorly and glide posteriorly on the tibia
What are the anterior ligaments that limit/resists extension and ER? - CORRECT
ANSWER-Iliofemoral ligament
-Y or V shaped
-strongest ligament in the human body
Pubofemoral ligament
What is the posterior ligament that limits/resists extension and IR? - CORRECT
ANSWER-Ischiofemoral ligament
What is the ligament of Bigelow? - CORRECT ANSWER-iliofemoral ligament
When are the iliofemoral, pubofemoral, and ischiofemoral ligaments taut? -
CORRECT ANSWER--during hip extension and slight ER
_during hip extension and abduction
-during hip extension and IR
What are the arthrokinematics of hip flexion? - CORRECT ANSWER-Roll
anterior, Glide posterior/inferior
What are the arthrokinematics of hip extension? - CORRECT ANSWER-Roll
posterior, glide anterior
What are the arthrokinematics of hip abduction? - CORRECT ANSWER-Roll
laterally, glide medially
What are the arthrokinematics of hip adduction? - CORRECT ANSWER-Roll
medially, glide laterally/superiorly
Arhtrokinematics of hip medial rotation? - CORRECT ANSWER-Roll anterior,
glide posterior
arthrokinematics of hip lateral rotation? - CORRECT ANSWER-Roll posterior,
glide anterior
, What happens to the moment arm if coxa valga is present? - CORRECT
ANSWER--Decreases shear to neck (positive)
-Decreases MA of abductors requiring greater force and increased JRF
(negative)
-positioned more lateral on acetabulum, possibly favoring dislocation
What happens to the moment arm if coxa vara is present? - CORRECT
ANSWER-Increases MA of abductors, but increases shear to femoral neck (risk
of Epiphyseal plate shearing=Slipped Capital Femoral Epiphysis)
-may cause fracture of the femoral neck)
Where does the line of gravity run through the femur? - CORRECT
ANSWER-Greater trochanter
What is considered a pathologic angle of anteversion? - CORRECT
ANSWER--Increased angle >15 degrees
-"KNOCK-KNEES"
What is considered a pathologic angle of retroversion? - CORRECT
ANSWER--decreased angle <8 degrees
-"TOE-OUT"
In what direction does the menisci glide in knee flexion and extension? -
CORRECT ANSWER-Flexion: glide posteriorly
Extension: glide anteriorly
Knee joint arthrokinematics: Flexion
OKC & CKC - CORRECT ANSWER-OKC (concave on convex) Tibia rolls and
glides posteriorly on femur
CKC (convex on concave) Femoral condyles roll posteriorly and glide anteriorly
on the tibia
Knee joint arthrokinematics: Extension
OKC & CKC - CORRECT ANSWER-OKC: Tibia rolls and glides anteriorly on the
femur
CKC: Femoral condyles roll anteriorly and glide posteriorly on the tibia
