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Nerves, Blood supply, origin, insertion

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Muscle
Origin
Insertion
Blood Supply
Innervation
Piriformis   Ant sacral surface between pelvic foramina & grooves from them; capsule of SI jt; upper pelvic surface of sacrotuberous lig; gluteal surface of ilium near posterior intferior iliac spine   Medial side of upper border of greater trochanter of femur   Pelvis - Lateral sacral Buttock - Superior gluteal a   N to piriformis L5-S2  
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Obturator externus   Medial 2/3 of external surface of obturator membrane and adjacent pubic and iscial rami   Trochanteric fossa of femur   Obturator a; medial circumflex femoral a   Post br of obturator n from L3,L4  
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Obturator internus   Pelvic surface of coxal bone from greater foramen; Medial part of pelvic surface of obturator membrane and obturator fascia; Inf ramus of pubis & ischial ramus   Ant impression on medial surface of greater trochanter anterosuperior to trachanteric fossa   (O,bip Gbip) Intrapelvic: Obturator a, br from internal pudendal Extrapelvic - Gemmellar br of internal pudendal   N to obturator internus from L5,S1 (same as gemellus sup)  
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Gemellus superior   Dorsal surface of ischial spine   Medial surface of greater trochanter with obturator internus   Internal pudendal and gemellar br   N to obturator internus L5,S1  
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Gemellus inferior   Upper part of ischial tuberosity immediately below lesser sciatic notch   Medial surface of greater trochanter with obturator internus   Medial circumflex femoral a   N to quadratus femoris L5,S1  
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Quadratus femoris   Upper part of external aspect of ischial tuberosity   Quadrate tubercle above middle trochanteric crest of femur   Medial circumflex femoral a; inferior gluteal a   N to quadratus femoris fromL5,S1  
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Gluteus Maximus   Aponeurosis of erector spinae; Dorsal surface of lower part of sacrum & side of coccyx, sacrotuberous lig; post gluteal line of ilium and crest below and behind it; gluteal aponeurosis over gluteus medius   Ilitibial tract Gluteal tuberosity of femur   (ML,LS,SI,IP,1PP)Superior & inferior gluteal aa; medial and lateral circumflex fem, 1st profunda perforator, lateral sacral, and internal pudendal   inferior gluteal n L5-S2  
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Gluteus medius   Outer surface of ileum between iliac crest and posterior and ant gluteal lines   Lateral surface of greater trochanter   Deep br of superior gluteal a; trochanteric anastomosis   Superior gluteal n L4-S1  
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Gluteus minimus   OUter surface of ileum between anterior and inferior gluteal lines; margin of greater sciatic notch   Aponeurosis to anterolateral surface of greater trochanter   Superior gluteal a and deep br; trochanteric anastomosis   Superior gluteal n L4-S1  
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Tensor fasciae latae   Anterior outer lip of iliac creest; lat surface of ant superior iliac spine and border of notch below; deep surface of fascia lata   2 layers of iliotibial tract 1/3 way down thigh   Ascending br of lateral circumflex femoral a, superfical circumflex iliac, and superior gluteal aa   Superior gluteal n L4-S1  
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