Chapter 10 Knee Joint

Question 1

Rectus Femoris O&I

Answer 1

Origin: anterior inferior iliac spine of the ilium and groove (posterior) above the acetabulum
Insertion: superior aspect of the patella and patellar tendon to tibial tuberosity

Question 2

Rectus Femoris Action

Answer 2

extension of knee, flexion of the hip, anterior pelvic rotation

Question 3

Rectus Femoris Innervation

Answer 3

femoral nerve (L2-L4)

Question 4

Vastus Intermedius O&I

Answer 4

Origin: upper 2/3 of anterior surface of femur
Insertion: upper border of the patella and patellar tendon to tibial tuberosity

Question 5

Vastus Intermedius Action

Answer 5

extension of knee

Question 6

Vastus Intermedius Innervation

Answer 6

femoral nerve (L2-L4)

Question 7

Vastus Lateralis (externus) O&I

Answer 7

Origin: intertrochanteric line, anterior and inferior borders of the greater trochanter, gluteal tuberosity, upper half of the linea aspera, and entire lateral intermusclar septum
Insertion: Lateral border of the patella and patellar tendon to tibial tuberosity

Question 8

Vastus Lateralis (externus) Action

Answer 8

extension of knee

Question 9

Vastus Lateralis (externus) Innervation

Answer 9

femoral nerve (L2-L4)

Question 10

Vastus Medialis (internus) O&I

Answer 10

Origin: who length of linea aspera and medial condyloid ridge
Insertion: medial half of upper border of patella and patellar tendon to tibial tuberosity

Question 11

Vastus Medialis (internus) Action

Answer 11

extension of knee

Question 12

Vastus Medialis (internus) Innervation

Answer 12

femoral nerve (L2-L4)

Question 13

Biceps Femoris O&I

Answer 13

Origin: Long Head-ischial tuberosity
Short Head- lower half of the linea aspera, and lateral condyloid ridge
Insertion: head of he fibula and lateral condyle of the tibia

Question 14

Biceps Femoris Action

Answer 14

flexion of the knee, extension of the hip, posterior pelvic rotation, external rotation of the knee, external rotation of the hip

Question 15

Biceps Femoris Innervation

Answer 15

Long head: sciatic nerve–tibial division (S1-S3)

Short head: sciatic nerve–peroneal division (L5, S1, S2)

Question 16

Popliteus O&I

Answer 16

Origin: Posterior surface of lateral condyle of femur
Insertion: Upper posterior medial surface of tibia

Question 17

Popliteus Action

Answer 17

internal rotation of the knee as it flexes, flexion of the knee

Question 18

Popliteus Innervation

Answer 18

tibial nerve (L5, S1)

Question 19

Semimembranosus O&I

Answer 19

Origin: Ischial tuberosity
Insertion: Posterior medial surface of the medial tibial condyle

Question 20

Semimembranosus Action

Answer 20

extension of the hip, flexion of the knee, posterior pelvic rotation, internal rotation of the hip, internal rotation

Question 21

Semimembranosus Innervation

Answer 21

sciatic nerve–tibial division (L5, S1, S2)

Question 22

Semitendinosus O&I

Answer 22

Origin: Ischial tuberosity
Insertion: Upper anterior medial surface of the tibia just below the condyle

Question 23

Semitendinosus Action

Answer 23

extension of the hip, flexion of the knee, posterior pelvic rotation, internal rotation of the hip, internal rotation of the knee

Question 24

Semitendinosus Innervation

Answer 24

sciatic nerve–tibial division (L5, S1, S2)