Chapter 18 knee joint

Question 1

vastus lateralis

Answer 1

O - linea aspera
I - tibial tuberosity
A - knee extension
N - femoral nerve (L2-L4)

Question 2

vastus medialis

Answer 2

O - linea aspera
I - tibial tuberosity
A - knee extension
N - femoral nerve (L2-L4)

Question 3

vastus intermedius

Answer 3

O - anterior femur
I - tibial tuberosity
A - knee extension
N - femoral nerve (L2-L4)

Question 4

gastrocnemius

Answer 4

O - posterior medial, lateral condyle of femur
I - posterior calcaneus
A - knee flexion, ankle plantar flexion
N - tibial nerve (S1, S2)

Question 5

popliteus

Answer 5

O - posterior lateral condyle of femur
I - posterior medial condyle of tibia
A- medial rotation of tibia on femur during initiation of knee flexion
N - tibial nerve (L4-S1)

Question 6

plantaris

Answer 6

O - lower part of lateral supracondylar ridge of femur
I - posterior calcaneus
A - Knee flexion and ankle plantar flexion
N - tibial nerve (S1, S2)

Question 7

Medial collateral ligament

Answer 7

attaches to medial condyles of femur and tibia to posterior and superior to axis of joint motion. stabilizes medial aspects of joint

Question 8

lateral collateral ligament

Answer 8

attaches to lateral femoral condyle and head of fibula to posterior and superior axis of joint motion . stabilizes lateral aspect of joint

Question 9

Anterior cruciate ligament

Answer 9

attaches to anterior surface of tibia to medial meniscus. maintains a-p stability

Question 10

posterior cruciate ligament

Answer 10

attaches to posterior tibia in intercondylar fossa to anterior of medial femoral condyle. maintains p-a stability

Question 11

semimembranosus

Answer 11

O- Ischial tuberosity
I - posterior surface of medial condyle of tibia
A - hip extension, knee flexion
N - sciatic nerve - tibial division (L5-S2)

Question 12

Semitendinosus

Answer 12

O - Ischial tuberosity
I - anterior medial condyle of tibia (pes anserine)
A - hip extension, knee flexion
N - sciatic nerve - tibial division (L5-S2)

Question 13

Biceps femoris long head

Answer 13

O - Ischial tuberosity
I - lateral aspect of head of fibula
A - hip extension, knee flexion
N - Sciatic nerve - tibial division (L5-S2)

Question 14

Biceps femoris short head

Answer 14

O - lateral lip of linea aspera
I - lateral aspect of head of fibula
A - knee flexion
N - common fibular (peroneal) nerve (L5-S2)