Lower Limb Practice Questions

Q: Which of the following statements about the iliotibial tract is incorrect?

All of the above statements are correct.. The **iliotibial tract (ITT)** is a longitudinal fibrous reinforcement of the **fascia lata** (the deep fascia of the thigh). Understanding its attachments and function is high-yield for NEET-PG anatomy. ### **Detailed Explanation** 1. **Origin and Derivation (Option B):** The ITT is a thickened lateral portion of the fascia lata. It extends from the iliac crest (specifically the tubercle of the iliac crest) down to the knee. 2. **Muscular Insertions (Option A):** Two major muscles insert into the ITT: * **Gluteus Maximus:** Approximately 3/4th (the superficial fibers) of this muscle inserts into the posterior aspect of the ITT. * **Tensor Fasciae Latae (TFL):** This muscle inserts into the anterior aspect of the ITT. Together, these muscles pull on the tract to stabilize the hip and knee. 3. **Distal Insertion (Option C):** The tract descends on the lateral side of the thigh and inserts onto a distinct facet on the **lateral condyle of the tibia**, known as **Gerdy’s tubercle**. Since all three statements (A, B, and C) are anatomically accurate, **Option D** is the correct choice. ### **Clinical Pearls for NEET-PG** * **Gerdy’s Tubercle:** Frequently asked in exams as the specific insertion point of the ITT on the tibia. * **ITT Syndrome:** A common overuse injury in runners caused by friction of the tract against the **lateral femoral epicondyle** during repetitive flexion and extension. * **Function:** The ITT acts as a dynamic stabilizer of the lateral knee joint and helps maintain the upright posture by steadying the pelvis on the femur. * **Nerve Supply:** The muscles associated with the tract are supplied by the **Superior Gluteal Nerve** (TFL) and **Inferior Gluteal Nerve** (Gluteus Maximus).

Q: A direct lateral blow to the knee results in a fracture in the intercondylar area. Which of the following structures is most likely to be injured?

Anterior Cruciate Ligament (ACL). **Explanation:** The **Anterior Cruciate Ligament (ACL)** is the correct answer because of its specific anatomical attachment within the **intercondylar area** of the tibia. The ACL originates from the anterior part of the intercondylar area of the tibia and extends superiorly, posteriorly, and laterally to attach to the lateral condyle of the femur. A direct lateral blow to the knee (valgus stress) often forces the tibia to slide anteriorly or rotate excessively relative to the femur, leading to an avulsion or tear specifically at its intercondylar attachment site. **Analysis of Options:** * **Medial Collateral Ligament (MCL):** While a lateral blow (valgus stress) frequently tears the MCL, it is an **extracapsular** ligament located on the medial aspect of the joint, not in the intercondylar area. * **Lateral Collateral Ligament (LCL):** This is injured by a medial blow (varus stress). Like the MCL, it is located on the exterior side of the joint. * **Menisci:** These are fibrocartilaginous structures located on the peripheral articular surfaces of the tibial plateaus, not within the central intercondylar notch. **Clinical Pearls for NEET-PG:** * **O’Donoghue’s Triple (Unhappy Triad):** A severe lateral blow often results in a concomitant injury to the **ACL, MCL, and Medial Meniscus** (though recent studies suggest the Lateral Meniscus is more commonly injured in acute ACL tears). * **Lachman Test:** This is the most sensitive clinical test for an ACL tear. * **Anatomy Tip:** The ACL prevents **anterior** displacement of the tibia on the femur, while the PCL (also in the intercondylar area) prevents **posterior** displacement.

Q: What bone forms the summit of the medial longitudinal arch of the foot?

Talus. **Explanation:** The **medial longitudinal arch** is the highest and most important arch of the foot, designed for shock absorption and propulsion. The **Talus** is the correct answer because it serves as the **"Keystone"** or the **summit** of this arch. It is the highest point where the weight of the body is transmitted from the tibia to the foot. **Why Talus is Correct:** The arch is composed of the calcaneum, talus, navicular, three cuneiforms, and the medial three metatarsals. The talus sits at the apex; its head fits into the acetabulum pedis (formed by the navicular and calcaneum), acting as the central point that receives and distributes mechanical stress. **Analysis of Incorrect Options:** * **A. Calcaneum:** Forms the **posterior pillar** of the arch. It provides the base for weight-bearing but is not the highest point. * **C. Navicular:** Located anterior to the talus. While it is a vital component of the arch’s "spring" mechanism, it sits lower than the talus. * **D. Medial Cuneiform:** Forms part of the **anterior pillar** of the arch, situated distal to the navicular. **High-Yield Clinical Pearls for NEET-PG:** * **Keystone of Lateral Longitudinal Arch:** Cuboid bone. * **Main Tie-Beam:** Plantar aponeurosis (prevents the arch from spreading). * **Main Dynamic Support:** Tibialis posterior tendon (its failure leads to flat foot/Pes Planus). * **Spring Ligament:** The Plantar Calcaneonavicular ligament; it supports the head of the talus at the summit. * **Highest point of the Lateral Arch:** The articular tubercle of the calcaneum.

Q: The adductor canal lies beneath which muscle?

Sartorius. The **Adductor Canal** (also known as Hunter’s canal or the subsartorial canal) is an aponeurotic tunnel located in the middle third of the medial thigh. It serves as a passage for the femoral vessels to reach the popliteal fossa. ### Why Sartorius is Correct The adductor canal is bounded by three distinct muscular/fascial walls. The **Sartorius muscle** forms the **roof** (superficial boundary) of the canal, supported by the subsartorial fascia. Because the canal is situated deep to this muscle, it is frequently referred to as the "subsartorial canal." ### Analysis of Incorrect Options * **Adductor Longus:** Forms the **posterior wall (floor)** of the canal in its upper part. * **Adductor Magnus:** Forms the **posterior wall (floor)** of the canal in its lower part. The canal ends at the adductor hiatus within this muscle. * **Vastus Medialis:** Forms the **anterolateral wall** of the canal. ### NEET-PG High-Yield Pearls * **Extent:** It begins at the apex of the femoral triangle and ends at the adductor hiatus (opening in the adductor magnus). * **Contents:** 1. **Femoral Artery** 2. **Femoral Vein** 3. **Saphenous Nerve** (Note: This is the longest cutaneous branch of the femoral nerve and exits the canal by piercing the roof). 4. **Nerve to Vastus Medialis.** * **Clinical Significance:** The **Adductor Canal Block** is a common regional anesthesia technique used for knee surgeries (e.g., TKR) because it provides sensory blockade via the saphenous nerve while sparing the motor fibers of the femoral nerve, allowing for early mobilization.

Q: Which of the following statements is true regarding the Peroneus longus muscle?

Helps maintain the arches of the foot. The **Peroneus longus** (Fibularis longus) is a key muscle of the lateral compartment of the leg. Understanding its unique course and insertion is vital for NEET-PG. ### **Explanation of the Correct Option** **C. Helps maintain the arches of the foot:** The tendon of the peroneus longus passes behind the lateral malleolus, crosses the sole of the foot obliquely from the lateral to the medial side, and inserts into the base of the **1st metatarsal and medial cuneiform**. This "sling-like" mechanism allows it to pull the medial and lateral sides of the foot together, acting as a primary dynamic stabilizer for the **lateral longitudinal arch** and the **transverse arch** of the foot. ### **Analysis of Incorrect Options** * **A. Inverts the foot:** Incorrect. The peroneus longus is a powerful **evertor** of the foot at the subtalar and transverse tarsal joints. It also assists in plantarflexion. * **B. Is supplied by the deep peroneal nerve:** Incorrect. It is supplied by the **superficial peroneal nerve** (L5, S1, S2). The deep peroneal nerve supplies the anterior compartment of the leg. * **D. Arises from the tibia:** Incorrect. It arises from the **head and upper two-thirds of the lateral surface of the fibula**. No muscles of the lateral compartment arise from the tibia. ### **High-Yield Clinical Pearls for NEET-PG** * **The "Stirrup" of the Foot:** Together with the **Tibialis anterior**, the Peroneus longus forms a functional "stirrup" that supports the arches. * **Nerve Injury:** Injury to the common peroneal nerve (at the neck of the fibula) leads to loss of eversion (lateral compartment) and dorsiflexion (anterior compartment), resulting in **Foot Drop**. * **Tendon Landmark:** The tendon of the peroneus longus runs in a groove on the **cuboid bone**, which is often converted into a canal by the long plantar ligament.

Q: The superior gluteal nerve supplies all of the following muscles, except?

Gluteus maximus. The **superior gluteal nerve (L4, L5, S1)** is a branch of the sacral plexus that exits the pelvis through the greater sciatic foramen, passing *above* the piriformis muscle. It is responsible for supplying the primary abductors and medial rotators of the hip. **Why Gluteus Maximus is the correct answer:** The **Gluteus maximus** is the exception because it is supplied by the **inferior gluteal nerve (L5, S1, S2)**. This nerve exits the greater sciatic foramen *below* the piriformis. The Gluteus maximus is the chief extensor of the hip, unlike the muscles supplied by the superior gluteal nerve. **Analysis of incorrect options:** * **Gluteus medius & Gluteus minimus:** These are the primary targets of the superior gluteal nerve. They act as the main stabilizers of the pelvis during the stance phase of walking. * **Tensor fascia lata (TFL):** This muscle is also supplied by the superior gluteal nerve. It helps in stabilizing the knee in extension and assists in hip abduction. **High-Yield Clinical Pearls for NEET-PG:** 1. **Trendelenburg Sign:** Injury to the superior gluteal nerve leads to paralysis of the gluteus medius and minimus. When the patient stands on the affected leg, the pelvis drops on the healthy (unsupported) side. 2. **Lurching Gait:** To compensate for the pelvic drop, the patient tilts their trunk toward the affected side while walking (Gluteus medius gait). 3. **Intramuscular Injections:** To avoid injuring the superior gluteal nerve and the sciatic nerve, injections are traditionally given in the **upper outer quadrant** of the gluteal region.

Q: What is located most medially in the femoral triangle?

Lymphatics. The **femoral triangle** is a high-yield anatomical region. To understand the arrangement of its contents, one must distinguish between the triangle itself and the **femoral sheath**. ### 1. Why Lymphatics is Correct The femoral sheath is a fascial funnel divided into three compartments. From **lateral to medial**, the arrangement is: * **Lateral compartment:** Femoral Artery * **Intermediate compartment:** Femoral Vein * **Medial compartment (Femoral Canal):** Contains **lymphatics** (specifically the lymph node of Cloquet/Rosenmüller) [1] and loose areolar tissue. Since the femoral canal is the most medial component of the sheath, the **lymphatics** are the most medial structure within the femoral triangle. A common mnemonic to remember the order from lateral to medial is **NAVY** (Nerve, Artery, Vein, Y-fronts/Lymphatics). ### 2. Why Other Options are Incorrect * **Artery (B) & Vein (A):** The femoral artery lies lateral to the vein. While both are medial to the nerve, they are lateral to the lymphatics. * **Nerve (C):** The **Femoral Nerve** is the most **lateral** structure. Crucially, it lies *outside* the femoral sheath, resting in the groove between the Psoas major and Iliacus muscles. ### 3. Clinical Pearls for NEET-PG * **Femoral Canal:** Its clinical significance lies in **femoral hernias**, which occur through this medial-most compartment [1]. * **Femoral Pulse:** To palpate the femoral artery, feel at the mid-inguinal point (halfway between the ASIS and symphysis pubis). * **Venous Access:** For femoral vein catheterization, the needle is inserted medial to the femoral artery pulse (Mnemonic: **V**ein is **V**ery close to the midline).

Q: What is the root value of the medial cutaneous nerve of the thigh?

L2, L3. **Explanation:** The **medial cutaneous nerve of the thigh** is a branch of the **anterior division of the femoral nerve**. The femoral nerve itself arises from the lumbar plexus, specifically the posterior divisions of the anterior rami of **L2, L3, and L4**. 1. **Why L2, L3 is correct:** After the femoral nerve passes deep to the inguinal ligament, it divides into anterior and posterior divisions. The medial cutaneous nerve of the thigh arises from the **anterior division**. It carries fibers specifically from the **L2 and L3** spinal levels. It supplies the skin on the medial aspect of the thigh and contributes to the subsartorial (Adductor) plexus. 2. **Analysis of Incorrect Options:** * **L1, L2:** This is the root value for the **Genitofemoral nerve**. The femoral branch of this nerve supplies the skin over the femoral triangle. * **L4, L5:** These roots contribute to the **Lumbosacral trunk**, which helps form the sciatic nerve. They do not contribute to the cutaneous innervation of the anterior or medial thigh. * **L5, S1:** These are primary roots for the **Common Peroneal (Fibular)** and **Tibial** components of the sciatic nerve, supplying the leg and foot. **High-Yield NEET-PG Pearls:** * **Femoral Nerve (L2-L4):** The largest branch of the lumbar plexus. * **Anterior Division Branches:** Medial cutaneous nerve of thigh, Intermediate cutaneous nerve of thigh, and the nerve to the Sartorius muscle. * **Posterior Division Branches:** Saphenous nerve (the longest cutaneous nerve in the body) and nerves to the Quadriceps femoris. * **Clinical Correlation:** The medial cutaneous nerve of the thigh communicates with the obturator and saphenous nerves to form the **subsartorial plexus**, located deep to the sartorius muscle.

Q: The Coronary Ligament is present in which joint?

Knee Joint. **Explanation:** The **Coronary Ligaments** (also known as meniscotibial ligaments) are specialized portions of the joint capsule in the **Knee Joint**. They connect the convex peripheral borders of the medial and lateral menisci to the non-articular margins of the tibial condyles. Their primary function is to anchor the menisci to the tibia while allowing them to slide slightly during rotation and flexion-extension movements. **Analysis of Options:** * **Knee Joint (Correct):** The coronary ligaments are essential components of the knee's complex ligamentous apparatus. The medial coronary ligament is generally tighter than the lateral one, which contributes to the medial meniscus being less mobile and more frequently injured. * **Shoulder Joint (Incorrect):** The shoulder is stabilized by the glenohumeral ligaments, coracohumeral ligament, and the glenoid labrum. It does not contain a coronary ligament. * **Hip Joint (Incorrect):** The hip is secured by the iliofemoral (Ligament of Bigelow), pubofemoral, and ischiofemoral ligaments. * **Ankle Joint (Incorrect):** The ankle is supported by the medial (deltoid) ligament and lateral ligaments (anterior/posterior talofibular and calcaneofibular). **High-Yield Clinical Pearls for NEET-PG:** * **Meniscal Mobility:** The lateral meniscus is more mobile than the medial meniscus because its coronary ligament is more lax and it is not attached to the fibular collateral ligament. * **Unhappy Triad (O'Donoghue):** Involves injury to the Anterior Cruciate Ligament (ACL), Medial Collateral Ligament (MCL), and Medial Meniscus. * **Anatomical Note:** Do not confuse these with the *Coronary Ligament of the Liver*, which reflects the peritoneum from the liver to the diaphragm. Always check the context of the question (Anatomy: Lower Limb).

Question 1

Which of the following statements about the iliotibial tract is incorrect?

Accepted Answer

All of the above statements are correct.

Answer

It receives the insertion of the gluteus maximus.

Answer

It is derived from the fascia lata.

Answer

It inserts on the lateral tibial condyle.

Question 2

A direct lateral blow to the knee results in a fracture in the intercondylar area. Which of the following structures is most likely to be injured?

Accepted Answer

Anterior Cruciate Ligament (ACL)

Answer

Medial Collateral Ligament (MCL)

Answer

Lateral Collateral Ligament (LCL)

Answer

Menisci

Question 3

What bone forms the summit of the medial longitudinal arch of the foot?

Accepted Answer

Talus

Answer

Calcaneum

Answer

Navicular

Answer

Medial Cuneiform

Question 4

The adductor canal lies beneath which muscle?

Accepted Answer

Sartorius

Answer

Adductor longus

Answer

Adductor magnus

Answer

Vastus medialis

Question 5

A patient with severe atherosclerosis of the external iliac artery and adjacent femoral artery is scheduled for coronary artery bypass surgery. The surgeon decides to use a long, mostly unbranched muscular vein found on the medial aspect of the leg both above and below the knee. Through which of the following structures does this vein pass to eventually join the femoral vein?

Accepted Answer

Fossa ovalis

Answer

Anatomic snuff box

Answer

Antecubital fossa

Answer

Inguinal canal

Question 6

Which of the following statements is true regarding the Peroneus longus muscle?

Accepted Answer

Helps maintain the arches of the foot

Answer

Inverts the foot

Answer

Is supplied by the deep peroneal nerve

Answer

Arises from the tibia

Question 7

The superior gluteal nerve supplies all of the following muscles, except?

Accepted Answer

Gluteus maximus

Answer

Gluteus medius

Answer

Gluteus minimus

Answer

Tensor fascia lata

Question 8

What is located most medially in the femoral triangle?

Accepted Answer

Lymphatics

Answer

Vein

Answer

Artery

Answer

Nerve

Question 9

What is the root value of the medial cutaneous nerve of the thigh?

Accepted Answer

L2, L3

Answer

L1, L2

Answer

L4, L5

Answer

L5, S1

Question 10

The Coronary Ligament is present in which joint?

Accepted Answer

Knee Joint

Answer

Shoulder Joint

Answer

Hip Joint

Answer

Ankle Joint

Lower Limb — MCQs

Lower Limb — MCQs

On this page

Practice by Chapter

Want unlimited practice?