Origin Anterior surface of lateral process of sacrum and gluteal surface of ilium at the margin of the greater sciatic notch Insertion Superior border of greater trochanter Action Lateral rotator of the hip joint; also helps abduct the hip if it is flexed Innervation Piriformis nerve (L5, S1, S2) (L5, S1, S2) Arterial Supply Superior and inferior gluteal and internal pudendal arteries
QUESTIONS 1 of 2 1 2 Previous Next You have 100% on this question. Just skip this one for now. Take This Question Anyway (OBQ11.258) Which of the following muscles originates from the ventral surface of the sacrum? Review Topic | Tested Concept QID: 3681 Type & Select Correct Answer 1 Obturator internus 16% (544/3376) 2 Obturator externus 5% (165/3376) 3 Quadratus femoris 5% (153/3376) 4 Piriformis 72% (2422/3376) 5 Superior gemellus 2% (75/3376) L 3 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 You have 100% on this question. Just skip this one for now. Take This Question Anyway (OBQ07.16) The inferior and superior gluteal nerves are designated as such based on their relationship to what structure? Review Topic | Tested Concept QID: 677 Type & Select Correct Answer 1 The gluteus maximus 3% (99/3315) 2 The gluteus minimus 4% (130/3315) 3 The piriformis muscle 76% (2534/3315) 4 The sciatic nerve 3% (84/3315) 5 The sacrospinous ligament 13% (442/3315) L 2 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3