Week 12

Question 1

Origin, insertion and action of
Rectus Femoris

Answer 1

Origin
Anterior inferior iliac spine (AIIS)

Insertion
Tibial tuberosity

Action
- Knee extension
- Hip flexion

Question 2

Origin, insertion and action of
Vastus Lateralis

Answer 2

Origin
Linea aspera

Insertion
Tibial tuberosity

Action
Knee extension

Question 3

Origin, insertion and action of
Vastus Medialis

Answer 3

Origin
Linea aspera

Insertion
Tibial tuberosity

Action
Knee extension

Question 4

Origin, insertion and action of
Vastus Intermedius (Intermedialis)

Answer 4

Origin
Linea aspera

Insertion
Tibial tuberosity

Action
Knee extension

Question 5

Origin, insertion and action of
Semimembranosus

Answer 5

Origin
Ischial tuberosity

Insertion
Medial condyle of tibia

Action
- Extend hip
- Flex knee

Question 6

Origin, insertion and action of
Semitendinosus

Answer 6

Origin
Ischial tuberosity

Insertion
Proximal tibia

Action
- Extend hip
- Flex knee

Question 7

Origin, insertion and action of
Popliteus

Answer 7

Origin
Lateral condyle

Insertion
Posterior medial condyle of tibia

Action
- Initiation of knee flexion
- Medial tibial rotation

Question 8

Main function of the
Patellofemoral joint

Answer 8

–> Increase the moment arm of the quadriceps muscle = greater force production

–> Protect the knee joint

Question 9

What joints are the knee comprised of?

Answer 9

• Tibiofemoral joint
• Patellofemoral joint

Question 10

what kind of joint is the knee joint? How many degrees of flexion does it have?

Answer 10

Synovial hinge* joint

Has 120-135 degrees of flexion

Question 11

True or false: there is accessory motion in the transverse plane as you move through flexion and extension

Answer 11

True

As the knee flexes: Tibial internal rotation

As the knee extends: Tibial external rotation

Question 12

What does the rectus femurs cross?

Answer 12

Cross hip AND knee

–> which is why it can help in hip flexion

Question 13

What is the biggest/largest and strongest quadricep muscle?

Answer 13

Vastus Lateralis

Question 14

Which of the quadricep muscles is most important in knee rehabilitation and controls the position of the patella?

Answer 14

Vastus Medialis

Question 15

Is the Vastus Intermedius (Intermedialis) superficial or deep to the rectus femoris?

Answer 15

Deep

Question 16

Where is the Semimembranosus located?

Where is it located in comparison to the semitendinosus?

Answer 16

Medial side of thigh

Deep to semitendinosus

Question 17

Is the Semitendinosus shorter and thicker or longer and narrower than the semimembranosus?

Answer 17

Much longer and narrower than semimembranosus

Question 18

True or false: the biceps femoris short head spans the knee and hip.

Answer 18

False

Short head only spans knee (not hip)

Question 19

Where is the Popliteus
located?

Where is it located in comparison to the gastrocnemius muscle?

Answer 19

Located in posterior compartment of knee

Runs lateral to medial

Deep to the gastrocnemius muscle