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Psoas Major
- O: bodies of T12-L5 vertebraetransverse processes of L1-L5intervertebral discs
- I: lesser trochanter
- N: ventral rami of lumbar nerve L1,L2,L3
- A: flexes thigh
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Iliacus
- O: iliac crest, iliac fossa, ala of sacrum, anterior sacroiliac ligament
- I: tendon of psoas majorlesser trochanter
- N: femoral nerve L2,L3
- A: flexes thigh, stabilizes hipjoint
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Gluteus Maximus
- O: external surface ilium between post. gluteal line and iliac crest; dorsal surface sacrum & coccyxsacrotuberous ligament
- I: iliotibial tract; gluteal tuberosity
- N: inferior gluteal L5,S1,S2
- A: lateral rot. (IT band);extension (gluteal tuberosity)
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Gluteus Medius
- O: external surface ilium between posterior and anterior gluteal lines
- I: lateral aspect greater trochanter
- N: superior gluteal L5,S1
- A: abducts thighmedially rotates thigh(if large, can laterally rotate)
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Gluteus Minimus
- O: external surface ilium between anterior and inferior gluteal lines
- I: anterior aspect greater trochanter
- N: superior gluteal L5,S1
- A: medially rotates thighabducts thigh
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Tensor Fasciae Latae
- O: lateral aspect ASIS
- I: iliotibial tract
- N: superior gluteal L4,L5
- A: abducts thigh;medially rotates thigh;flexes thigh
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Pectineus
- O: bodies of T12-L5 vertebrae transverse processes of L1-L5 intervertebral disc
- I: lesser trochanter
- N: ventral rami of lumbar nerve L1,L2,L3
- A: flexes thigh
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Adductor Brevis
- O: external surface body and inferior ramus of pubis
- I: pectineal linelesser trochanterproximal end of linea aspera
- N: obturator nerve L2,L3,L4, abranch of anterior division
- A: adducts thigh (minor flexor)
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Adductor Longus
- O: ant. aspect body of pubis
- I: medial lip linea aspera –middle 1/3
- N: obturator nerve L2,L3,L4, abranch of anterior division
- A: adducts thigh
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Adductor Magnus
- O: adductor: inferior ramusof pubis and ischium; hamstring: lower part of ischialtuberosity
- I: adductor: gluteal tuberosity,linea aspera, medial supracondylar ridge; hamstring: adductor tubercle
- N: adductor: obturator nerveL2,L3,L4hamstring: tibial nerve L4
- A: adducts thigh ; adductor: flexes thigh; hamstring: extends thigh
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Piriformis
- O: anterior surface of sacrum between 2nd to 4th sacral foramen(adjacent ilium)(sacrotuberous ligament)
- I: superior border greater trochanter
- N: ventral rami of S1, S2
- A: laterally rotates (when extended thigh, even more powerful)abducts with thigh flexed
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Obturator Externus
- O: rami of pubis and ischium medial 2/3 of obturator membrane (external surface)
- I: trochanteric fossa
- N: obturator nerve L3,L4
- A: laterally rotates thigh
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Obturator Internus
- O: pelvic surface obturator membrane margin of obturator foramen (inf. and sup. ramus pubis, inf. ramus ischium)
- I: medial surface greater trochanter
- N: nerve to obturator internus L5, S1
- A: laterally rot. extended thigh abducts flexed thigh stabilizes hip
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Gemellus Superior
- O: dorsal surface spine of ischium
- I: blends with obturator int. tendon (attaches to medial surface of greater trochanter)
- N: nerve to obturator internus L5, S1
- A: laterally rot. extended thigh abducts flexed thigh stabilizes hip
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Gemellus Inferior
- O: superior aspect ischial tuberosity
- I: blends with obturator int. tendon (attaches to medial surface of greater trochanter)
- N: nerve to quadratus femoris L5,S1
- A: laterally rot. extended thigh abducts flexed thigh stabilizes hip
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Quadratus Femoris
- O: external aspect ischial tuberosity
- I: quadrate tubercle and adjacent bone inferiorly
- N: nerve to quadratus femoris L5,S1
- A: laterally rotates thigh stabilizes hip
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