Anatomy Exam Joints of the Lower Limb 3

Question 1

The knee joint's medial meniscus is more frequently injured than the lateral meniscus because:

Accepted Answer

It is firmly attached to the medial collateral ligament

Answer

The medial meniscus is attached to the medial collateral ligament, limiting its mobility and making it more susceptible to tearing with rotational forces.

Question 2

The 'screw-home mechanism' of the knee involves which final movement when the knee reaches full extension?

Accepted Answer

Lateral rotation of the tibia on the femur

Answer

As the knee reaches full extension, the tibia rotates laterally (or femur medially) to lock the joint into a close-packed, stable position.

Question 3

Which structure prevents posterior displacement of the tibia relative to the femur?

Accepted Answer

Posterior cruciate ligament

Answer

The posterior cruciate ligament (PCL) is the primary restraint against posterior tibial translation, preventing the tibia from sliding backward under the femur.

Question 4

The suprapatellar bursa of the knee joint communicates with which structure?

Accepted Answer

The joint cavity itself

Answer

The suprapatellar bursa almost always communicates with the knee joint cavity, so joint effusions commonly extend into this bursa above the patella.

Question 5

The oblique popliteal ligament at the knee is an expansion of which tendon?

Accepted Answer

Semimembranosus

Answer

The oblique popliteal ligament is a reflection of the semimembranosus tendon that reinforces the posterior knee capsule.

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Joints of the Lower Limb 3