Biol129_C13 - The Gluteal Region Gluteal Muscles Nine...

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1 The Gluteal Region Gluteal Muscles • Nine muscles responsible for femoral abduction and rotation • General origin: posterior aspect of pelvis • General insertion: proximal femur • Covered from superficial to deep
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2 Superficial Gluteus • Gluteus Maximus – Most superficial – O: Ilium, dorsal surf of Sacrum; I: Iliotibial tract & gluteal tuberosity – Extends leg, assist lateral rot., rising from sit • Tensor Fascia Lata – O: ASIS, ant iliac crest; I: Iliotibial tract – Abduct & medial rot., levels pelvis when ipsilateral limb is weight bearing Schematic
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3 Deep Gluteus • Gluteus Medius – O: Ilium btw ant & post glut lines; I: lat surf of greater trochanter • Gluteus Minimus – O: Ilium btw ant & inf glut lines; I: ant surf of greater trochanter • Both abduct & med rot leg., level pelvis under weight (like: tensor fascia lata) • Innervation: Sup gluteal n Deep Gluteal Muscles • Piriformis – O: ant sacrum & sacrotuberous lig; I: Sup greater trochanter • Obturator internus – O: Obturator memb.; I: Med surf greater trochanter – O: Sup: Ischial spine, Inf. Ischial tuber; I: Med surf greater trochanter • Lat rot. of extended leg, abduct flexed leg, hold femur in acetabulum
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Biol129_C13 - The Gluteal Region Gluteal Muscles Nine...

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