LE Joints

Question 1

Femoral-on-pelvic OC: coxofemoral flexion and extension

Answer 1

convex femur spins on concave acetabulum

Question 2

Femoral-on-pelvic OC: coxofemoral abduction

Answer 2

convex femur rolls superior and slides inferior

Question 3

Femoral-on-pelvic OC: coxofemoral adduction

Answer 3

convex femur rolls inferior and slides superior

Question 4

Femoral-on-pelvic OC: coxofemoral ER

Answer 4

convex femur rolls posterior and slides anteriorly

Question 5

Femoral-on-pelvic OC: coxofemoral IR

Answer 5

convex femur rolls anterior and slides posterior

Question 6

pelvic-on-femoral CC: flexion and extension

Answer 6

concave acetabulum spins on convex femur

Question 7

pelvic-on-femoral CC: abduction

Answer 7

concave acetabulum rolls and slides superior

Question 8

pelvic-on-femoral CC: adduction

Answer 8

concave acetabulum rolls and slides inferior

Question 9

pelvic-on-femoral CC: ER

Answer 9

concave acetabulum rolls and slides posterior

Question 10

pelvic-on-femoral CC: IR

Answer 10

concave acetabulum rolls and slides anterior

Question 11

femoral-on-tibia CC: flexion

Answer 11

convex femur rolls posterior and slides anterior

Question 12

femoral-on-tibia CC: extension

Answer 12

convex femur rolls anterior and slides posterior

Question 13

femoral-on-tibia CC: IR and ER

Answer 13

convex femur spins on concave tibia

Question 14

tibia-on-femoral OC: flexion

Answer 14

concave tibia rolls and slides posterior

Question 15

tibia-on-femoral OC: extension

Answer 15

concave tibia rolls and slides anterior

Question 16

tibia-on-femoral OC: IR and ER

Answer 16

concave tibia spins on convex femur

Question 17

Talocrural OC: dorsiflexion

Answer 17

talus rolls anterior and slides posterior

Question 18

talocrural OC: plantarflexion

Answer 18

talus rolls posterior and slides anterior

Question 19

talocrural CC: dorsiflexion

Answer 19

concave mortise rolls and slides anterior

Question 20

talocrural CC: plantarfelxion

Answer 20

mortise rolls and slides posterior

Question 21

transverse tarsal OC: pronation twist

Answer 21

(eversion, abduction, and dorsiflexion)
concave navicular spins on convex talus

Question 22

transverse tarsal OC: supination twist

Answer 22

(inversion, adduction, and plantarflexion)
concave navicular spins on convex talus

Question 23

MTP and IP OC: flexion

Answer 23

concave phalanx rolls and slides in plantar direction

Question 24

MTP OC: extension

Answer 24

concave phalanx rolls and slides dorsally

Question 25

MTP CC: extension

Answer 25

convex metatarsal rolls dorsally and slides in plantar direction