Muscles of the Hip and Thigh

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Author:
msviolet_26
ID:
92292
Filename:
Muscles of the Hip and Thigh
Updated:
2011-06-28 14:42:43
Tags:
muscles hip thigh
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Description:
origin, insertion, action, nerve supply
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  1. 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
  2. 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
  3. 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)
  4. 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)
  5. 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
  6. Tensor Fasciae Latae
    • O: lateral aspect ASIS
    • I: iliotibial tract
    • N: superior gluteal L4,L5
    • A: abducts thigh;medially rotates thigh;flexes thigh
  7. 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
  8. 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)
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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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