Pelvic and gluteal region; Lower limb muscles

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  1. Coccygeous
    • Prox attachment: sacrum and coccyx
    • Dist attachment: ischial spine
    • Actions: support pelvic organs; maintain urinary and fecal continence
    • Innervation: Branches from S3-5 ventral rami
  2. Levator ani
    • 3 parts
    • Pubococcygeus
    • Iliococcygeus
    • Puborectalis

    • Anterior attachment: pubis and tendinous arch on obturator internus, ischial spine
    • Posterior attachment: coccyx, contralateral levator ani, ligamentous midline structures
    • Actions: support pelvic organs, maintain urinary and fecal continence
    • Innervation: branches from S3-5 ventral rami
  3. Gluteus maximus
    • Prox attachment: sacrum, ilium, sacrotuberous lig
    • Dist attachment: iliotibial band, gluteal tuberosity of femur
    • Actions: extend thigh; laterally rotate thigh
    • Innervation: Inferior gluteal n (L5-S2)
  4. Gluteus Medius
    • Prox attachment: ilium
    • Dist attachment: greater trochanter of femur
    • Actions: abduct thigh, medially rotate thigh
    • Innervation: Superior gluteal n (L5-S1)
  5. Gluteus Minimus
    • Prox attachment: ilium
    • Dist attachment: greater trochanter of femur
    • Actions: abduct thigh, medially rotate thigh
    • Innervation: Superior gluteal n (L5-S1)
  6. Tensor Fasciae Latae
    • Prox attachment: ASIS and iliac crest
    • Dist attachment: IT band
    • Actions: abduct thigh, medially rotate thigh, flex thigh
    • Innervation: Superior gluteal n (L4-S2)
  7. Hamstrings
    • Prox attachment: ischial tuberosity or femoral shaft (short head of BF)
    • Dist attachment: tibia (SM, ST) and fibula (BF)
    • Actions: extend thigh (except short head of BF), flex leg, medially rotate knee (ST and SM), laterally rotate knee (BF)
    • Innervation: Sciatic n (L5-S2)
  8. Adductor longus and brevis
    • Prox attachment: body of pubis
    • Dist attachment: linea aspera of femur
    • Actions: adduct thigh, flex thigh
    • Innervation: Obturator n (L2-4)
  9. Adductor magnus (adductor portion)
    • Prox attachment: ischiopubic ramus
    • Dist attachment: linea aspera of femur
    • Actions: adduct thing, flex thigh
    • Innervation: Sciatic and obturator n (L2-4)
  10. Adductor magnus (hamstring portion)
    • Prox attachment: ischial tuberosity
    • Dist attachment: adductor tubercle of femur
    • Actions: adduct thigh, extend thigh
    • Innervation: Sciatic and obturator (L2-4)
  11. Gracilis
    • Prox attachment: pubis
    • Dist attachment: medial proximal tibia
    • Actions: adduct thigh, flex thigh, flex leg, medially rotate leg
    • Innervation: Obturator n (L2-3)
  12. Obturator externus
    • Prox attachment: obturator foramen margin
    • Dist attachment: trochanteric fossa of femur
    • Actions: laterally rotate thigh, adduct thigh
    • Innervation: Obturator n (L3-4)
  13. Pectinous
    • Prox attachment: superior pubic ramus
    • Dist attachment: posterior femur distal to lesser trochanter (pectineal line)
    • Actions: adduct thigh, flex thigh
    • Innervation: Femoral n (L2-3)
  14. Iliopsoas
    • Prox attachment: iliac fossa (Iliacus), transverse process of lumbar vertebrae (Psoas major)
    • Dist attachment: lesser trochanter of femur
    • Actions: flex thigh
    • Innervation: Femoral n (L1-3)
  15. Sartorius
    • Prox attachment: ASIS
    • Dist attachment: Proximal medial surface of tibia
    • Actions: flex thigh, abduct thigh, laterally rotate thigh, flex leg, medially rotate leg
    • Innervation: Femoral n (L2-3)
  16. Quadriceps femoris
    • Prox attachment: AIIS (rectus femoris); shaft of femur (vasti)
    • Dist attachment: tibial tuberosity via patellar lig
    • Actions: extend leg, flex thigh (rectus femoris only)
    • Innervation: femoral n (L2-4)
  17. Triceps surae & Plantaris
    • Gastrocnemius, Soleus, and Planters
    • Prox attachment: distal femur (gastrocnemius and plantaris); tibia and fibula (Soleus)
    • Dist attachment: cancaneal tuberosity via cancaneal tendon
    • Actions: plantar flex ankle, flex leg (gastroc only)
    • Innervation: Tibial n (S1-2)
  18. Popliteus
    • Prox attachment: lateral femoral condyle and lateral meniscus of knee
    • Dist attachment: posterior proximal tibia
    • Actions: lateral rotation of femur on tibia, medial rotation of tibia on femur
    • Innervation: Tibial n (L4-S3)
  19. Flexor hallucis longus
    • Prox attachment: fibula
    • Dist attachment: distal phalanx l
    • Actions: flex joints of digit l, weakly plantar flex foot
    • Innervation: Tibial n (S2-S3)
  20. Flexor digitorum longus
    • Prox attachment: tibia
    • Dist attachment: distal phalanges ll-V
    • Actions: flex joints of digits ll-V, weakly plantar flex foot
    • Innervation: Tibial n (S1-S3)
  21. Tibialis posterior
    • Prox attachment: posterior tibia, fibula, and interosseous membrane
    • Dist attachment: tarsals and bases of metatarsals ll-lV
    • Actions: plantarflex foot, invert foot
    • Innervation: Tibial n (L4-L5)
  22. Fibularis Longus
    • Prox attachment: shaft of fibula
    • Dist attachment: plantar surface of 1st metatarsal base and tarsal
    • Actions: evert foot, weakly plantarflex foot
    • Innervation: Superficial fibular n (L5-S2)
  23. Fibular Brevis
    • Prox attachment: shaft of fibula
    • Dist attachment: base of 5th metatarsal
    • Actions: evert foot, weakly plantarflex foot
    • Innervation: Superficial fibular n (L5-S2)
  24. Extensor hallucis longus
    • Prox attachment: anterior surface of fibula and interosseous membrane
    • Dist attachment: distal phalanx l
    • Actions: extend joints of digit l, dorsiflex foot
    • Innervation: Deep fibular n (L5-S1)
  25. Extensor digitorum longus
    • Prox attachment: anterior surface of fibula and interosseous membrane
    • Dist attachment: distal phalanges ll-V
    • Actions: extend joints of digits ll-V, dorsiflex foot
    • Innervation: Deep fibular n (L5-S1)
  26. Fibularis Tertius
    • Prox attachment: anterior fibula and interosseous membrane
    • Dist attachment: dorsum of base of 5th metatarsal
    • Actions: dorsiflex foot, evert foot
    • Innervation: Deep fibular n (L5-S1)
  27. Tibialis Anterior
    • Prox attachment: anterior tibia and interosseous membrane
    • Dist attachment: plantar surface of base of 1st metatarsal and tarsal
    • Actions: dorsiflex foot, invert foot
    • Innervation: Deep fibular n (L4-5)
  28. Extensor hallucis brevis
    • Prox attachment: calcaneus
    • Dist attachment: proximal phalanx l
    • Actions: extend MTP joint of digit l
    • Innervation: deep fibular n (L5-S1)
  29. Extensor digitorum brevis
    • Prox attachment: calcaneus
    • Dist attachment: middle phalanges ll-lV
    • Actions: extend MTP and PIP joints of digits ll-lV
    • Innervation: deep fibular n (S1-2)
  30. Hallucal muscles
    • Abductor hallucis
    • Flexor hallucis brevis
    • Adductor hallucis
    • Dist attachment: proximal phalanx of digit l
    • Innervation: medial plantar n (S2-S3; abductor hallucis and flexor hallucis brevis); lateral plantar n (S2-3; adductor hallucis)
    • *Plantar nerves are branches of the tibial nerve
  31. Digiti Minimi muscles
    • Abductor digiti minimi
    • Flexor digiti minimi brevis
    • Dist attachment: prox phalanx of digit V
    • Innervation: lateral plantar n (S2-3)
  32. Flexor digitorum brevis
    • Prox attachment: calcaneus
    • Dist attachment: middle phalanges ll-V
    • Innervation: medial plantar n (S2-3)
  33. Quadrates plantae
    • Prox attachment: calcaneus
    • Dist attachment: tendon of flexor digitorum longus
    • Actions: assists FDL in flexion of digits
    • Innervation: lateral plantar n (S2-3)
  34. Lumbricals
    • Prox attachment: FDL tendons
    • Dist attachment: extensor expansions ll-V
    • Actions: flex MTP joints while extending PIP and DIP joints
    • Innervation: Medial plantar n (S2-S3; 1st lumbrical), lateral plantar n (S2-3; lateral 3 lumbricals)
  35. Interossei
    • 3 plantar, 4 dorsal
    • PAD, DAB
    • Actions: abduct digits ll-lV (dorsal), adduct digits lll-V (plantar)
    • Innervation: lateral plantar n (S2-3)
  36. Piriformis
    • Prox attachment: anterior sacrum and sacrotuberous ligament
    • Dist attachment: greater trochanter
    • Actions: Laterally rotate thigh, abduct thigh when flexed
    • Innervation: N. to piriformis (L5-S2)
  37. Superior Gemellus
    • Prox attachment: ischial spine
    • Dist attachment: greater trochanter (trochanteric fossa)
    • Actions: laterally rotate thigh; abduct thigh when flexed
    • Innervation: N. to obturator internus (L5-S1)
  38. Obturator Internus
    • Prox attachment: internal surface of obturator membrane and margin of foramen
    • Dist attachment: greater trochanter (trochanteric fossa)
    • Actions: laterally rotate thigh; abduct thigh when flexed
    • Innervation: N. to obturator internus (L5-S1)
  39. Inferior Gemellus
    • Prox attachment: ischial tuberosity
    • Dist attachment: greater trochanter (trochanteric fossa)
    • Actions: laterally rotate thigh; abduct thigh when flexed
    • Innervation: N. to quadratus femoris (L5-S1)
  40. Quadratus Femoris
    • Prox attachment: ischial tuberosity
    • Dist attachment: intertrochanteric crest
    • Actions: laterally rotate thigh
    • Innervation: N. to quadratus femoris(L5-S1)

Card Set Information

Author:
ajvcm7
ID:
321870
Filename:
Pelvic and gluteal region; Lower limb muscles
Updated:
2016-12-24 22:12:34
Tags:
Gross Anatomy
Folders:

Description:
Gross Anatomy Unit 4
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