Knee muscles

Question 1

What are the 4 quadricep muscles

Answer 1

Rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

Question 2

Rectus femoris origin and insertion

Answer 2

O = AIIS
I = Tibial tuberosity

Question 3

Rectus femoris primary concentric actions

Answer 3

Hip flexion
Knee extension

Question 4

Vastus lateralis origin and insertion

Answer 4

O = lateral lip of linea aspera and greater trochanter
I = tibial tuberosity and lateral border of patella

Question 5

Vastus lateralis concentric actions

Answer 5

Knee extension

Question 6

Vastus medialis O and I

Answer 6

O = Medial lip of linea aspera
I = Tibial tuberosity and medial border of patella

Question 7

Vastus medialis concentric actions

Answer 7

Knee extension

Question 8

Vastus intermedius O and I

Answer 8

O = anterior and lateral shaft of femur
I = tibial tuberosity

Question 9

Concentric actions of vastus intermedius

Answer 9

Knee extension

Question 10

What is the only quadricep muscle that crosses the hip joint

Answer 10

Rectus femoris

Question 11

Sartorius O and I

Answer 11

O = ASIS
I = Proximal medial tibia at the pes anserinus tendon

Question 12

Concentric actions of the sartorius

Answer 12

Hip flexion
Hip abduction
Hip external rotation
Knee flexion

Question 13

TFL O and I

Answer 13

O = iliac crest, posterior to ASIS
I = iliotibial tract into Gerdy’s tubercle on lateral tibial condyle

Question 14

TFL concentric actions

Answer 14

Hip flexion
Hip abduction
Hip internal rotation
Knee external rotation

Question 15

Knee hamstring muscles Os and Is already covered in hip

Question 16

All three hamstring muscles (with the exception of the short head of the biceps femoris), have an origin on the ____________

Answer 16

Ischial tuberosity

Question 17

Biceps femoris concentric actions

Answer 17

Hip extension
Knee flexion
Knee external rotation

Question 18

Semitendinosus concentric actions

Answer 18

Hip extension
Knee flexion
Knee internal rotation

Question 19

Semimembranosus concentric actions

Answer 19

Hip extension
Knee flexion
Knee internal rotation

Question 20

Gastrocnemius O and I

Answer 20

Lateral head O = posterior aspect of lateral femoral condyle
Medial head O = posterior aspect of medial femoral condyle
I = calcaneus via Achilles tendon

Question 21

Concentric actions of the gastrocnemius (and plantaris)

Answer 21

Knee flexion
Ankle plantarflexion

Question 22

Concentric actions of the popliteus

Answer 22

Knee flexion
Knee internal rotation

Question 23

O and I of the gracilis

Answer 23

O = inferior ramus of pubis
I = proximal medial tibia at pes anserinus tendon

Question 24

Concentric actions of the gracilis

Answer 24

Hip adduction
Hip internal rotation