Human Anatomy Final Exam Questions With 100% Correct Answers

Human Anatomy Final Exam Questions With 100% Correct Answers Q.What is the origin, insertion, action and innervation of the gluteus medius?--ANSWERS--Origin: outer surface of ilium Insertion: posterolateral surface of greater trochanter Action=abducts and medially rotates hip. Innervation=superior gluteal nerve (L4–5, S1) Q.What is the origin, insertion, action and innervation of the gluteus minimus?--ANSWERS--Origin: outer surface of ilium, below the gluteus medius Insertion: anterior surface of greater trochanter Action=abducts and medially rotates hip. Innervation=superior gluteal nerve (L4–5, S1) Q.What is the origin, insertion, action and innervation of the gluteus maximus?--ANSWERS--origin=outer surface of ilium, sacrum and coccyx Insertion= femur and iliotibial tract action= hip extensor nerve= inferior gluteal nerve Q.What is the origin, insertion, action and innervation of the obturator internus?--ANSWERS--origin: rim of pubis and ischium insertion: greater trochanter of femur action: laterally rotates the hip innervation: nerve to obturator internus (L5, S1–2) Q.What is the origin, insertion, action and innervation of the piriformis?--ANSWERS--Origin: anterior side of sacrum insertion: greater trochanter of femur action: abductor and lateral rotator of femur nerve: anterior primary rami of S1–S2 Q.What does the iliopsoas pass through and where does it insert?--ANSWERS--Passes through the inguinal canal to insert on the lesser trochanter Q.Why are the gluteal muscles essential in you being a biped?--ANSWERS--They prevent you from falling over as you take a step with the opposite leg forward Q.What is the iliotibial tract?--ANSWERS--A thickened layer of the fascia latae fascia on the lateral side of the thigh that connects to the tensor fasciae latae. Q.What is the origin, insertion, action and innervation of the tensor fasciae latae?--ANSWERS--origin: top of the outer surface of anterior iliac crest insertion: iliotibial tract (anterior surface of lateral condyle of tibia) action: tenses the iliotibial tract nerve: superior gluteal nerve (L4–5, S1) Q.Which muscle is like the "ulna of the leg"? Which muscle is like the "radius of the leg"?--ANSWERS--Ulna of the leg=tibia radius of the leg= fibula (but it doesn't rotate) Q.Which bone of the leg contains the knee joint?--ANSWERS--The tibia Q.What is the lateral malleolus and the medial malleolus and which bones contain each?--ANSWERS--Lateral malleolus is a little bump on the bottom of the fibula. Medial malleolus is a little bump on the bottom of the tibia. Q.What is the fascia lata?--ANSWERS--The fascia covering the leg muscles down to the knee. (called the Deep Fascia below the knee) Q.There are 3 fascia–divided compartments in the thigh each innervated by a different nerve with different muscle groups. What are these three groups?--ANSWERS--Anterior, Medial and Posterior compartment Q.What nerve innervates the muscles in the Anterior compartment of the thigh?--ANSWERS--The Femoral nerve Q.What nerve innervates the muscle in the medial compartment of the thigh?--ANSWERS--The Obturator nerve Q.What nerve innervates the muscles in the posterior compartment of the thigh?--ANSWERS--The Sciatic nerve