Lower Limb Anatomy Quiz 2026

A 12-year-old male presents to the orthopedic clinic with persistent hip pain following a sports injury. An X-ray of the pelvis reveals a lucent, Y-shaped cartilaginous junction within the hip socket, which the radiologist identifies as the triradiate cartilage. This structure marks the point of fusion for the bones that comprise the hip socket.

The acetabulum is formed by the union of which three bones?

• Ilium, Ischium, Pubis

• Ilium, Ischium, Sacrum

• Ilium, Pubis, Coccyx

• Ischium, Pubis, Sacrum

A 19‑year‑old athlete presents after twisting his ankle during training. Examination reveals tenderness over the lateral aspect of the lower leg, but imaging shows no disruption of the bone.

Which of the following is NOT a function of the bone?

• Weight-bearing

• Muscle attachment

• Articulation

• Articulation with the talus

A 22‑year‑old footballer presents after being tackled during a match. He reports difficulty straightening his knee and has weakness when attempting to rise from a squatting position. On examination, there is reduced power during active knee extension.

Which muscle group is primarily responsible for extension of the knee?

• Gluteal muscles

• Quadriceps femoris

• Hamstrings

• Iliopsoas

A 33‑year‑old cyclist presents with weakness when attempting to flex at the hip and extend the knee after a fall. On examination, there is reduced power in the muscles of the anterior thigh compartment, although sensation over the anterior thigh and medial leg remains intact.

Which nerve supply the anterior compartment of the thigh?

• Sciatic nerve

• Femoral nerve

• Obturator nerve

• Tibial nerve

A 28‑year‑old long‑distance runner presents with pain and swelling in the posterior aspect of his lower leg after increasing the intensity of his training. On examination, there is tenderness over the most superficial muscle in the posterior compartment of the leg, which plays a major role in plantarflexion during running.

Which muscle is the most superficial structure in the posterior compartment of the leg?

• Soleus

• Gastrocnemius

• Plantaris

• Popliteus

Which of the following is a potential consequence of incompetent valves in the veins of the lower limb?

• Deep vein thrombosis

• Arterial embolism

• Varicose veins

• Muscle atrophy

Which of the following is NOT a typical movement of the hip joint?

• Flexion

• Extension

• Abduction

• Supination

What is the primary function of the iliopsoas muscle?

• To extend the hip

• To flex the hip

• To adduct the hip

• To abduct the hip

Which of the following muscles is responsible for both hip flexion and knee flexion?

• Rectus femoris

• Vastus lateralis

• Biceps femoris

• Sartorius

Which of the following is a potential complication of a femoral neck fracture?

• Avascular necrosis of the femoral head

• Ruptured Achilles tendon

• Meniscal tear

• Ankle sprain