Knee Joint

Question 1

What is the Origin of the Sartorius Muscle?

Answer 1

• Anterosuperior Iliac Spine
• Superior Half of the notch just distal to the spine

Question 2

What is the Insertion of the Sartorius Muscle?

Answer 2

• Proximal Medial surface of Tibia

Question 3

What does the Sartorius Perform?

Answer 3

• Knee Flexion
• Knee Internal Rotation

Question 4

What is the Gracilis Origin?

Answer 4

• Anteromedial Ramus of Pubis

Question 5

What is the Gracilis Insertion?

Answer 5

-Anteromedial Surface of the Tibia

Question 6

What does the Gracilis Perform?

Answer 6

• Knee Flexion
• Knee Internal Rotation

Question 7

What is the Origin of the Rectus Femoris?

Answer 7

• Anteroinferior Iliac Spine (Straight Head)
• Groove above rim of Acetabulum (Reflected Head)

Question 8

What is the Insertion of the Rectus Femoris?

Answer 8

• Patellar Ligament to Tibial Tuberosity

Question 9

What does the Rectus Femoris Perform?

Answer 9

• Knee Extension

Question 10

What is the Origin of the Semitendinosus?

Answer 10

• Ischial Tuberosity

Question 11

What is the Insertion of the Semitendinosus?

Answer 11

• Proximal Medial Tibia
• Deep fascia of the Leg

Question 12

what does the Semitendinosus Perform?

Answer 12

• Knee Flexion
• Knee Internal Rotation

Question 13

What is the Semimembranosis Orign?

Answer 13

• Ischial Tuberosity

Question 14

What is the Semimembranosus Insertion?

Answer 14

• Postmedial aspect of the tibial medial condyle

Question 15

What does the semimembranosus perform?

Answer 15

• Knee Flexion
• Knee Internal Rotation

Question 16

What is the Origin of the Biceps Femoris?

Answer 16

• Sacrotuberous Ligament
• Ischial Tuberosity
• Linea Aspera
• Lateral Supracondylar Line

Question 17

What is the Insertion of the Biceps Femoris?

Answer 17

• Lateral Side of head of Fibula
• Lateral Condyle of Tibia

Question 18

What does the biceps femoris do?

Answer 18

• Flex Knee
• Externally Rotate Knee

Question 19

What is the Origin of the Popliteus?

Answer 19

• Posterior Lateral femoral condyle

Question 20

What is the insertion of the popliteus?

Answer 20

• Upper posterior medial surface of tibia

Question 21

What does the Popliteus do?

Answer 21

• Knee Flexion
• Knee Internal Rotation
• unlocks extended Knee

Question 22

What is the origin of the gastrocnemius?

Answer 22

• Posterior Medial Femoral Condyle (Medial head)
• Posterior Lateral Femoral Condyle (Lateral Head)

Question 23

What is the Insertion of the Gastrocnemius?

Answer 23

• Posterior Calcaneus through achilles tendon

Question 24

What does the gastrocnemius do?

Answer 24

• Plantar Flex ankle Joint
• Flex Knee joint

Question 25

What is the Anterior Cruciate Ligament responsible for?

Answer 25

- Preventing anterior movement of the tibia relative to the femurs position and medial rotation

Question 26

What is the Posterior Cruciate Ligament responsible for?

Answer 26

- Preventing posterior movement of the tibia relative to the femurs position

Question 27

What is the Medial Collateral Ligament responsible for?

Answer 27

- Preventing the knee from abducting

Question 28

What is the lateral collateral ligament responsible for?

Answer 28

- Preventing the knee from adducting

Question 29

How do menisci get injured?

Answer 29

- squatting, twisting, or direct contact

Question 30

Where do the Vastus Intermedius, Medialis, and Lateralis Insert?

Answer 30

- Patella - Tibial Tuberosity through Patellar Tendon

Question 31

List the Knee Flexors

Answer 31

Sartorius, Gracilis, Semitendinosus, Semimembranosus, Biceps Femoris, Popliteus, Gastrocnemius

Question 32

List the Knee Extensors

Answer 32

Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius

Question 33

List the Knee Internal Rotators

Answer 33

Sartorius, Gracilis, Semitendinosus, Semimembranosus, Popliteus

Question 34

List the Knee External Rotators

Answer 34

Biceps Femoris

Question 35

How does the popliteus help with knee flexion?

Answer 35

It unlocks an extended knee by performing internal rotation (med to lat) and flexion

Question 36

Why is our MCL larger than our LCL?

Answer 36

- There are more compressive forces on the medial leg due to how we often stand. Gravity tries to force abduction.