Lower Limb Practice Questions

Q: Which one of the following arteries pierces the oblique popliteal ligament of the knee joint?

Middle genicular artery. Detailed anatomical study reveals that the **middle genicular artery**, a branch of the popliteal artery, is unique among the genicular arteries in that it **pierces the oblique popliteal ligament**. It then supplies the **cruciate ligaments**, synovial membrane, and the posterior aspect of the **menisci** within the knee joint. *Medial superior genicular artery* - This artery runs **above the medial condyle of the femur** and contributes to the genicular anastomosis around the knee joint. - It does **not pierce the oblique popliteal ligament**; instead, it passes superficial to it. *Lateral superior genicular artery* - This artery passes **above the lateral condyle of the femur**, contributing to the blood supply of the knee joint. - Like the medial superior genicular artery, it runs **superficial to the oblique popliteal ligament**, rather than piercing it. *Posterior tibial recurrent artery* - The **posterior tibial recurrent artery** is a variable branch, usually originating from the posterior tibial artery, which ascends to the knee. - It typically supplies the posterior aspects of the knee joint but **does not pierce the oblique popliteal ligament**.

Q: Which of the following statements is true regarding the saphenous opening?

Allows passage of the Great Saphenous Vein. ***Allows passage of the Great Saphenous Vein*** - The saphenous opening is a gap in the **fascia lata** that allows the **great saphenous vein** to pass through and drain into the **femoral vein** [1]. - This is the **primary anatomical and clinical significance** of the saphenous opening [1]. - This anatomical arrangement is crucial for venous return from the lower limb [1]. *Located superomedial to the pubic tubercle* - This is **incorrect** - the saphenous opening is actually located **inferolateral** (not superomedial) to the pubic tubercle. - It lies approximately 3-4 cm inferolateral to the pubic tubercle, within the **femoral triangle**. *Forms an opening in the fascia* - While technically true that it is an opening in the **fascia lata**, this statement is too **vague and non-specific**. - It doesn't specify which fascia or convey the functional/clinical significance of the opening. - The more precise answer identifies its primary function (passage of the great saphenous vein). *Covered by superficial fascia* - This is **misleading** - the saphenous opening is covered by the **cribriform fascia**, which is a specialized, perforated modification of the superficial fascia. - Saying it's simply "covered by superficial fascia" doesn't capture the specific anatomical structure (cribriform fascia) that fills this opening.

Q: The nutrient artery to the fibula arises from which artery?

Peroneal artery. ***Peroneal artery*** - The **peroneal artery** (also known as the fibular artery) is the primary blood supply to the fibula, giving rise to its largest **nutrient artery**. - This artery typically arises from the **posterior tibial artery** and courses along the posterior compartment of the leg, providing branches to the fibula. *Anterior tibial artery* - The **anterior tibial artery** primarily supplies the anterior compartment of the leg, including muscles and the tibia, but not the fibula's main nutrient artery. - It descends into the foot to become the **dorsalis pedis artery**. *Posterior tibial artery* - While the **peroneal artery** often originates from the posterior tibial artery, the posterior tibial artery itself does not directly give rise to the main **nutrient artery of the fibula**. - Its main function is to supply the posterior compartment muscles and the tibia, as well as several branches to the foot. *Popliteal artery* - The **popliteal artery** is a large artery in the posterior knee that bifurcates into the anterior and **posterior tibial arteries**. - It is too far proximal to directly give rise to the fibula's nutrient artery; its branches supply more proximal structures around the knee.

Q: Altered sensation over the area of the great saphenous vein in the leg is seen due to an injury to which of the following nerves?

Femoral. ***Femoral*** - The **femoral nerve** gives rise to the **saphenous nerve**, which runs with the great saphenous vein and provides sensation to the medial aspect of the leg and foot. - Injury to the femoral nerve or its saphenous branch can result in altered sensation in the distribution of the **great saphenous vein**. *Tibial* - The **tibial nerve** innervates muscles in the posterior compartment of the leg and provides sensation to the sole of the foot and parts of the ankle, not the area of the great saphenous vein. - Injury to the tibial nerve often leads to **motor deficits** (plantar flexion) and sensory loss on the bottom of the foot. *Sural* - The **sural nerve** provides sensation to the posterolateral aspect of the leg and the lateral side of the foot, distinct from the great saphenous vein's territory. - This nerve is often injured during procedures around the **lateral malleolus** or Achilles tendon. *Fibular* - The **fibular nerve** (also known as the common peroneal nerve) innervates the anterior and lateral compartments of the leg and provides sensation to the dorsum of the foot and lateral leg. - Injury typically results in **foot drop** and sensory loss **dorsum of foot**.

Question 1

Which one of the following arteries pierces the oblique popliteal ligament of the knee joint?

Accepted Answer

Middle genicular artery

Answer

Medial superior genicular artery

Answer

Lateral superior genicular artery

Answer

Posterior tibial recurrent artery

Question 2

Which of the following statements is true regarding the saphenous opening?

Accepted Answer

Allows passage of the Great Saphenous Vein

Answer

Forms an opening in the fascia

Answer

Covered by superficial fascia

Answer

Located superomedial to the pubic tubercle

Question 3

The nutrient artery to the fibula arises from which artery?

Accepted Answer

Peroneal artery

Answer

Anterior tibial artery

Answer

Posterior tibial artery

Answer

Popliteal artery

Question 4

Altered sensation over the area of the great saphenous vein in the leg is seen due to an injury to which of the following nerves?

Accepted Answer

Femoral

Answer

Fibular

Answer

Tibial

Answer

Sural

Lower Limb — MCQs

Lower Limb — MCQs

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