Lower Limb Practice Questions

Q: Superior gluteal nerve does not supply?

Gluteus maximus. ***Gluteus maximus*** - The **gluteus maximus** muscle is primarily innervated by the **inferior gluteal nerve** (L5, S1, S2), not the superior gluteal nerve. - Its main actions include **extension** and **external rotation** of the hip. *Tensor fasciae latae* - The **tensor fasciae latae** is innervated by the **superior gluteal nerve** (L4, L5, S1). - This muscle helps in **flexion**, **abduction**, and **internal rotation** of the hip. *Gluteus medius* - The **gluteus medius** muscle receives its innervation from the **superior gluteal nerve** (L4, L5, S1). - It is a primary **abductor** and **internal rotator** of the hip, crucial for pelvic stability. *Gluteus minimus* - The **gluteus minimus** is also innervated by the **superior gluteal nerve** (L4, L5, S1). - Its functions are similar to the gluteus medius, including **abduction** and **internal rotation** of the hip.

Q: Which structure is contained within the femoral canal?

Deep inguinal lymph node. ***Deep inguinal lymph node*** - The **femoral canal** contains several structures: a **lymph node (of Cloquet or Rosenmüller)**, **lymphatic vessels**, and **loose areolar tissue**. [1] - Among these contents, the **deep inguinal lymph node** (also called the lymph node of Cloquet or Rosenmüller) is the **most clinically significant and specifically named structure**. - This lymph node is an important anatomical landmark, serving as a sentinel node that drains lymph from the lower limb, external genitalia, and perineum. - **Clinically**, it is the structure most commonly referenced when discussing femoral canal contents, particularly in the context of femoral hernias and lymphatic drainage patterns. [1] *Loose areolar tissue and fat* - While **loose areolar tissue and fat** are indeed present within the femoral canal, they are **supporting contents** rather than specifically named anatomical structures. [1] - These tissues fill the space and allow for expansion of adjacent vessels (femoral artery and vein), but they are not the primary structure of anatomical or clinical significance. - When asked about "the structure" in the femoral canal, the named lymph node is the more specific answer. *Lymphatic vessels* - **Lymphatic vessels** do traverse the femoral canal, but they are **conduits** rather than a discrete, named structure. [1] - These vessels drain lymph towards the deep inguinal lymph node (of Cloquet) located within the same canal. - The specifically named lymph node is the more definitive anatomical answer than the unnamed vessels passing through. *Femoral vein* - The **femoral vein** is located in the **intermediate compartment of the femoral sheath**, NOT within the femoral canal. - The femoral sheath has three compartments: lateral (femoral artery), intermediate (femoral vein), and medial (femoral canal). - The femoral vein lies lateral to the femoral canal, making this option clearly incorrect.

Q: Which of the following prevents hyperextension of the thigh?

Iliofemoral ligament. ***Iliofemoral ligament*** - The **iliofemoral ligament** is the strongest ligament in the hip joint and forms an inverted Y-shape. - Its primary function is to prevent **hyperextension of the thigh** by spiraling around the femoral neck and tightening during extension. *Ischiofemoral ligament* - The **ischiofemoral ligament** is located posteriorly and prevents **over-adduction** and **internal rotation** of the hip. - It also contributes to restricting hyperextension, but is not the primary restraint compared to the iliofemoral ligament. *Patellofemoral ligament* - The **patellofemoral ligament** is located in the knee joint, connecting the patella to the femur. - It stabilizes the **patella** and helps prevent its lateral dislocation, having no role in thigh hyperextension. *Puboischial ligament* - The term **puboischial ligament** is not a standard anatomical term for a hip joint ligament that prevents hyperextension. - This option likely refers to a combination of parts of the hip bone or other ligaments without a clear function related to thigh hyperextension.

Q: Which of the following statements is true about the anatomy of the great saphenous vein?

Ascends anterior to the medial malleolus.. ***Ascends anterior to the medial malleolus.*** - The **great saphenous vein (GSV)** originates on the dorsum of the foot and passes **anterior to the medial malleolus** to ascend the medial side of the leg [1]. - This anatomical landmark is **consistently present** and crucial for identifying the vein during clinical procedures such as venous cutdown and physical examination [1]. - The GSV continues to ascend along the medial aspect of the leg and thigh to terminate at the saphenofemoral junction. *Ends at the femoral vein 2.5 cm below the inguinal ligament.* - The GSV terminates by joining the **femoral vein** at the **saphenofemoral junction** in the femoral triangle. - This junction is located approximately **3-4 cm below and lateral to the pubic tubercle**, not simply 2.5 cm below the inguinal ligament. - The precise location varies among individuals. *Starts as a continuation of the medial marginal vein.* - The GSV is formed by the union of the **dorsal vein of the great toe** and the **dorsal venous arch** of the foot. - While the **medial marginal vein** is part of the superficial venous system of the foot and contributes to the dorsal venous arch, it is not accurate to say the GSV is a direct continuation of the medial marginal vein alone. *There are usually more than 5 valves below the knee.* - While this statement might seem plausible, there is **significant individual variation** in valve numbers. - The GSV typically has **5-10 valves below the knee**, meaning some individuals have exactly 5, while others have more. - The phrase "usually more than 5" is **imprecise** and not universally true, making it an incorrect statement for exam purposes. - In contrast, the anterior position relative to the medial malleolus is a **constant anatomical feature** [1].

Q: What is the approximate length of the tibia in centimeters for an average adult?

35 cm. ***35 cm*** - The **tibia**, or shin bone, is the larger of the two bones in the lower leg and plays a crucial role in supporting body weight. - Its average length in adults is approximately **36-38 cm**, with **35 cm** being well within the normal range for an average adult. - Females typically have tibiae measuring **36-37 cm**, while males average **38-39 cm**. *30 cm* - A length of **30 cm** would be unusually short for an adult tibia, falling well below the normal range for average adults. - Such a short length might be associated with specific medical conditions or skeletal dysplasias. *40 cm* - A length of **40 cm** would be at the upper end or slightly above the typical average for an adult tibia. - This measurement might be seen in taller individuals, but it exceeds the average for most adults. *45 cm* - A length of **45 cm** would be comparatively long for an average adult tibia. - This measurement is significantly above average and would only be seen in very tall individuals.

Q: The blood supply to femoral head is mostly by?

Profunda femoris. ***Profunda femoris*** - The profunda femoris artery (deep femoral artery) gives rise to the **medial and lateral circumflex femoral arteries**, which are the primary blood supply to the femoral head in adults - Specifically, the **medial circumflex femoral artery** and its branches (lateral epiphyseal arteries and retinacular arteries) form an extracapsular arterial ring and penetrate the joint capsule to supply the femoral head - The profunda femoris is thus the main parent vessel responsible for femoral head blood supply *Lateral epiphyseal artery* - This artery is a branch of the **medial circumflex femoral artery**, which originates from the profunda femoris - While it directly supplies the femoral head and is the dominant terminal branch, it represents a more specific component of the arterial network rather than the main source vessel - It provides blood to the lateral and superior portions of the femoral head *Medial epiphyseal artery* - This artery is also a branch of the circumflex femoral arteries, which originate from the profunda femoris - It contributes to the blood supply but is less dominant than the lateral epiphyseal branches - Similar to lateral epiphyseal artery, it is part of the retinacular arterial system *Artery of ligamentum teres* - The **artery of the ligamentum teres** (foveal artery) is an inconsistent and often small vessel, typically a branch of the **obturator artery** or medial circumflex femoral artery - While it contributes to blood supply especially in children, its contribution is usually minor in adults and often insufficient to sustain the femoral head alone - It enters through the fovea capitis and its contribution diminishes with age

Q: Which muscle is attached to the lateral surface of the greater trochanter?

Gluteus medius. ***Gluteus medius*** - The **gluteus medius** inserts onto the **lateral surface of the greater trochanter** of the femur. - Its primary actions include **abduction** and **internal rotation** of the hip. *Gluteus maximus* - The **gluteus maximus** inserts primarily into the **iliotibial tract** and the **gluteal tuberosity** of the posterior femur, not the lateral greater trochanter. - Its main roles are **hip extension** and **external rotation**. *Gluteus minimus* - The **gluteus minimus** inserts onto the **anterior part of the lateral surface (anterolateral aspect)** of the greater trochanter, anterior to the gluteus medius insertion. - Like the gluteus medius, it also contributes to **hip abduction** and **internal rotation**. *Piriformis* - The **piriformis** muscle inserts onto the **superior and medial aspect of the greater trochanter**. - Its main actions are **external rotation** and **abduction** of the hip, particularly when the hip is flexed.

Q: Sacrotuberous ligament is pierced by

Perforating cutaneous nerve. ***Perforating cutaneous nerve*** - The **perforating cutaneous nerve** typically pierces the sacrotuberous ligament to innervate the skin over the medial part of the lower gluteal region. - This nerve originates from the **S2 and S3 anterior rami**. *Posterior femoral cutaneous* - The **posterior femoral cutaneous nerve** runs inferior to the piriformis muscle, superficial to the sacrotuberous ligament, but does not pierce it. - It supplies the skin on the posterior thigh and popliteal fossa. *Superior gluteal nerve* - The **superior gluteal nerve** exits the pelvis through the greater sciatic foramen, superior to the piriformis muscle, and does not interact with the sacrotuberous ligament in this manner. - It innervates the **gluteus medius, gluteus minimus**, and **tensor fasciae latae muscles**. *Sciatic nerve* - The **sciatic nerve** exits the pelvis via the greater sciatic foramen, inferior to the piriformis muscle, and passes superficial to the sacrotuberous ligament. - It does not pierce the ligament, but rather lies in close proximity to its inferior border.

Q: Which of the following statements about the great saphenous vein is true?

It runs anterior to medial malleolus. **It runs anterior to medial malleolus** - The **great saphenous vein** originates from the medial end of the **dorsal venous arch** of the foot and ascends anterior to the **medial malleolus** [1]. - This anatomical relationship makes it accessible for various clinical procedures, such as **venous cutdown** for rapid intravenous access [1]. *It begins at lateral end of dorsal venous arch* - The **great saphenous vein** actually begins at the **medial end** of the dorsal venous arch, not the lateral end [1]. - The **small saphenous vein** arises from the lateral end of the dorsal venous arch [1]. *It is accompanied by the sural nerve* - The **sural nerve** typically accompanies the **small saphenous vein**, not the great saphenous vein, in the posterior leg [1]. - The **saphenous nerve**, a branch of the femoral nerve, accompanies the great saphenous vein throughout its course in the leg. *Terminates into popliteal vein* - The **great saphenous vein** normally terminates by draining into the **femoral vein** in the femoral triangle, not the popliteal vein [1]. - The **small saphenous vein** is the one that typically drains into the popliteal vein [1].

Q: Main blood supply to the head and neck of femur comes from

Medial circumflex femoral artery. ***Medial circumflex femoral artery*** - The **medial circumflex femoral artery** is the primary arterial supply to the **head and neck of the femur**, particularly via its **retinacular branches**. - These branches ascend along the femoral neck within the joint capsule, supplying most of the femoral head. *Lateral circumflex femoral artery* - The **lateral circumflex femoral artery** primarily supplies the muscles of the **anterior compartment of the thigh**, including the quadriceps femoris. - While it contributes to anastomoses around the hip, its direct supply to the femoral head and neck is less significant than the medial circumflex. *Artery of ligamentum teres* - The **artery of the ligamentum teres** (foveal artery) supplies a small, variable portion of the **femoral head**, mainly in children. - Its contribution to the overall blood supply to the adult femoral head and neck is often negligible or absent. *Popliteal artery* - The **popliteal artery** is located in the **popliteal fossa** behind the knee joint and is the continuation of the femoral artery. - Its branches supply the structures around the knee and lower leg, not the femoral head and neck.

Question 1

Superior gluteal nerve does not supply?

Accepted Answer

Gluteus maximus

Answer

Tensor fasciae latae

Answer

Gluteus medius

Answer

Gluteus minimus

Question 2

Which structure is contained within the femoral canal?

Accepted Answer

Deep inguinal lymph node

Answer

Loose areolar tissue and fat

Answer

Lymphatic vessels

Answer

Femoral vein

Question 3

Which of the following prevents hyperextension of the thigh?

Accepted Answer

Iliofemoral ligament

Answer

Ischiofemoral ligament

Answer

Patellofemoral ligament

Answer

Puboischial ligament

Question 4

Which of the following statements is true about the anatomy of the great saphenous vein?

Accepted Answer

Ascends anterior to the medial malleolus.

Answer

Ends at the femoral vein 2.5 cm below the inguinal ligament.

Answer

Starts as a continuation of the medial marginal vein.

Answer

There are usually more than 5 valves below the knee.

Question 5

What is the approximate length of the tibia in centimeters for an average adult?

Accepted Answer

35 cm

Answer

30 cm

Answer

40 cm

Answer

45 cm

Question 6

The blood supply to femoral head is mostly by?

Accepted Answer

Profunda femoris

Answer

Lateral epiphyseal artery

Answer

Medial epiphyseal artery

Answer

Artery of ligamentum teres

Question 7

Which muscle is attached to the lateral surface of the greater trochanter?

Accepted Answer

Gluteus medius

Answer

Gluteus maximus

Answer

Gluteus minimus

Answer

Piriformis

Question 8

Sacrotuberous ligament is pierced by

Accepted Answer

Perforating cutaneous nerve

Answer

Posterior femoral cutaneous nerve

Answer

Superior gluteal nerve

Answer

Sciatic nerve

Question 9

Which of the following statements about the great saphenous vein is true?

Accepted Answer

It runs anterior to medial malleolus

Answer

It begins at lateral end of dorsal venous arch

Answer

Terminates into popliteal vein

Answer

It is accompanied by the sural nerve

Question 10

Main blood supply to the head and neck of femur comes from

Accepted Answer

Medial circumflex femoral artery

Answer

Lateral circumflex femoral artery

Answer

Artery of ligamentum teres

Answer

Popliteal artery

Lower Limb — MCQs

Lower Limb — MCQs

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