Anatomy

Question 1

What nerve is now known to innervate the majority of the adductor muscles of the thigh?

Answer 1

The obturator nerve is the main nerve innervating the adductor muscles.

Question 2

What is the Pes Anserinus?

Answer 2

Also called the Goose’s foot, is the common insertion of sartorius, gracilis and semitendinosus.

Question 3

What does the Pes Anserinus do?

Answer 3

Help stabilize knee posture during partial flexion of the knee.
Long and extensible muscles are sensitive to stretch and may provide important proprioceptive input to the CNS for regulating coordinated actions of leg muscles.

Question 4

Is the fibula part of the knee joint?

Answer 4

No it has no articular surface with the joint space.

Question 5

Important connective tissue structures of the knee include?

Answer 5

2 cruciate ligaments, 2 collateral ligaments and 2 menisci

Question 6

What does the ACL do?

Answer 6

Limit hyperextension of knee & posterior displacement of femur on tibia.

Question 7

What does the PCL do?

Answer 7

Prevent anterior displacement of femur.

Question 8

What structure forms the floor of the Popliteal Fossa?

Answer 8

The Oblique Popliteal Ligament

Question 9

How many knee bursts are there?

Answer 9

There are 8 bursas in the knee: 
Suprapatellar 
Infrapatellar
Patellar
Prepatellar
Sartorius
Gracilis
Semitendinosus
Pes Anserine

Question 10

How does the knee lock?

Answer 10

In full extension, the knee is locked by rotating the femur medially on the tibia. This medial rotation is due to the lateral femoral condyle moving posteriorly in the lateral tibial condyle.

Question 11

How does the knee unlock?

Answer 11

To unlock the knee, the femur is laterally rotated on the tibia by the popliteus muscle, enabling normal flexion.