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glutes, piriformis, tricepts coxae

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muscles
origin
insertion
inervation
action
Superior gemellus   Ischial spine   Medial surface of greater trochanter (trochanteric fossa)   Nerve to obturator internus (L5,S1)   laterally rotate the ext. thigh, abduct flex thigh, steady femoral head in the acetabulum  
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Obturator internus   Pelvic surface of obturator membrane & surrounding bones   Medial surface of greater trochanter (trochanteric fossa)   Nerve to obturator internus (L5,S1)   laterally rotate the ext. thigh, abduct flex thigh, steady femoral head in the acetabulum  
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Inferior gemellus   Ischial tuberosity   Medial surface of greater trochanter (trochanteric fossa)   Nerve to quadratus femoris (L5,S1)   laterally rotate the ext. thigh, abduct flex thigh, steady femoral head in the acetabulum  
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piriformis   Ant surface of sacrum & sacrotuberous ligament   Sup border of greater trochanter of femur   Branches of ventral rami S1 & S2   laterally rotate, abd. flexed thigh, steadies femoral head in acetabulum  
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gluteus maximus   Proximal attachment: ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, and sacrotuberous ligament   Distal attachment: most fibers end in iliotibial tract that inserts into lateral tibial condyle; some fibers insert on gluteal tuberosity   superior gluteal   ext. thigh, lat rotation,  
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gluteus medius   Proximal attachment: External surface of ilium between anterior and posterior gluteallines   Distal attachment: lateral surface of greater trochanter of femur   inf. gluteal   abd., medial rotatation, keeps pelvis level when opposite is raised  
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gluteus minimus   Proximal attachment: external surfaceof ilium between anterior and inferior gluteal lines   Distal attachment: anterior surface of greater trochanter of femur   inf. gluteal   abd., medial rotatation, keeps pelvis level when opposite is raised  
🗑


   

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