Lower Limb Anatomy MCQ Compilation — Set 2 OmpathStudy

Continued from $1. Question 1 Cutaneous nerve supply of the thigh involves all but which of the following A. The intermediate femoral cutaneous nerve B. The obturator nerve C. The genital branch of the genitofemoral nerve D. The ilioinguinal nerve E. The posterior cutaneous nerves of the thigh Answer: A. The intermediate femoral cutaneous nerve Explanation: The genital branch of the genitofemoral nerve supplies the scrotum/labia majora and cremaster muscle, NOT the thigh skin. All others provide cutaneous innervation to the thigh. --- Question 22 Question 2 The patellar plexus takes twigs from all but which of the following? A. Infrapatellar branch of the common peroneal nerve B. Medial femoral cutaneous nerve C. Lateral femoral cutaneous nerve D. Intermediate femoral cutaneous nerve E. Infrapatellar branch of the saphenous nerve Answer: A. Infrapatellar branch of the common peroneal nerve Explanation: The patellar plexus receives contributions from saphenous nerve, medial, intermediate, and lateral femoral cutaneous nerves. There is NO infrapatellar branch from the common peroneal nerve. --- Question 23 Question 3 The inferior gluteal nerve supplies A. Gluteus maximus B. Gluteus medius C. Gluteus minimus D. All of the above E. None of the above Answer: A. Gluteus maximus Explanation: Inferior gluteal nerve (L5, S1, S2) supplies ONLY gluteus maximus. Gluteus medius and minimus are supplied by the superior gluteal nerve. --- Question 24 Within the buttock A. The pudendal nerve emerges beneath piriformis, turns around the back of the sacrospinous ligament and passes between the… B. The internal pudendal artery can be compressed against the base of the ischial tuberosity C. The sciatic nerve (L4, 5, S1) emerges from below piriformis muscle more laterally than the inferior gluteal and pudendal… D. The posterior femoral cutaneous nerve lies medially to the sciatic nerve E. The cruciate anastomosis provides the main source of blood for the supply of the head of femur Answer: A. The pudendal nerve emerges beneath piriformis, turns around the back of the sacrospinous ligament and passes between the… Explanation: Pudendal nerve exits below piriformis, hooks around the sacrospinous ligament, and re-enters pelvis through lesser sciatic foramen. The sciatic nerve is L4-S3 (not just L4,5,S1). --- Question 25 Question 5 With respect to the ligaments around the knee joint A. The fibular collateral ligament blends with the capsule and is attached to the lateral meniscus B. The tibial collateral ligament blends posteriorly with the capsule and is attached to the medial meniscus C. The oblique popliteal ligament is an expansion from the tendon of semitendinosus that blends with the capsule posteriorly D. The posterior cruciate ligament runs from anterior tibial plateau to the posteromedial aspect of the lateral femoral condyle E. The transverse ligament runs posteriorly between menisci Answer: A. The fibular collateral ligament blends with the capsule and is attached to the lateral meniscus Explanation: The tibial (medial) collateral ligament is firmly attached to the medial meniscus and joint capsule. The fibular collateral ligament is NOT attached to the lateral meniscus. Oblique popliteal ligament is from semimembranosus. --- Question 26 Question 6 With respect to the posterior compartment of the leg, which is FALSE? A. Plantaris arises from the lower part of the lateral supracondylar line and is absent in 10% B. The medial head of gastrocnemius is larger than the lateral C. The small saphenous vein drains the medial side of the dorsal venous arch and medial margin of the foot D. The soleal muscle contains a rich plexus of small veins → the soleal pump E. The nerve of this compartment is the tibial nerve Answer: A. Plantaris arises from the lower part of the lateral supracondylar line and is absent in 10% Explanation: The small saphenous vein drains the LATERAL (not medial) side of the dorsal venous arch and lateral margin of the foot. The great saphenous drains the medial side. --- Question 27 The myotome for plantar flexion of the great toe is A. L3, 4 B. L4, 5 C. L5, S1 D. S1, 2 E. S2, 3 Answer: A. L3, 4 Explanation: Plantar flexion of the great toe (flexor hallucis longus) is primarily S1, S2. Remember: ankle plantarflexion is also S1, S2. --- Question 28 Question 8 With respect to the hip bone A. The pelvic rim is formed by the iliac crest, tubercular area and pectineal line B. The iliofemoral ligament and sartorius are attached to the anterosuperior iliac spine C. The iliopubic eminence on anterior margin of acetabulum joins the ischium and pubic bone D. The tubercle of the iliac crest lies 7.5cm behind the anterosuperior iliac spine E. The line between the highest point of the iliac crest passes through the spine of L4 Answer: A. The pelvic rim is formed by the iliac crest, tubercular area and pectineal line Explanation: A line through the highest points of the iliac crests (supracristal line) passes through the L4