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 (OBQ11.258) Which of the following muscles originates from the ventral surface of the sacrum? QID: 3681 Type & Select Correct Answer 1 Obturator internus 15% (738/4874) 2 Obturator externus 4% (213/4874) 3 Quadratus femoris 5% (226/4874) 4 Piriformis 73% (3564/4874) 5 Superior gemellus 2% (107/4874) L 3 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic (OBQ07.16) The inferior and superior gluteal nerves are designated as such based on their relationship to what structure? QID: 677 Type & Select Correct Answer 1 The gluteus maximus 3% (144/4685) 2 The gluteus minimus 4% (189/4685) 3 The piriformis muscle 78% (3647/4685) 4 The sciatic nerve 2% (104/4685) 5 The sacrospinous ligament 12% (571/4685) L 2 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic
All Videos (0) Podcasts (3) Anatomy⎪Piriformis Anatomy - Piriformis Listen Now 4:49 min 8/13/2020 43 plays 0.0 (0) Anatomy⎪Piriformis Rachel Hoppner (OB) Anatomy - Piriformis Listen Now 4:49 min 8/13/2020 11 plays 0.0 (0) Anatomy⎪Piriformis Rachel Hoppner (OB) Anatomy - Piriformis Listen Now 4:49 min 8/3/2020 11 plays 5.0 (1)