LAB 10, inf. limb myology

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jskunz
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204446
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LAB 10, inf. limb myology
Updated:
2013-03-06 20:59:19
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inf limb myology
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inf. limb mm
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  1. posterior and lateral mm. of hip
    • 4
    • gluteus max m, gluteus medius m., gluteus mini m, tensor fasciae latae m, and
  2. gluteus maxiumus m.
    • origin: bony sacrum, iliac crest, coccyx
    • insertion: proximolateral aspect of femoral body and iliotibial tract
    • action: extend coxal joint, rotate thigh laterally, some adduction of limb at coxal joint
  3. gluteus medius m.
    • origin: gluteal surface of ilium
    • insertion: greater trochanter of femur bone
    • action: abduct limb at coxal joint, rotate thigh laterally
  4. gluteus minimus m.
    • positioned DEEP to gluteus medius m.
    • origin: gluteal surface of ilium 
    • insertion: greater trochanter of femur bone
    • action: abduct limb at coxal joint
  5. tensor fasciae latae m.
    • origin: anterior superior iliac spine
    • insertion: lateral condyle of the tibia (via iliotibial tract)
    • action: flex coxal jt, abduct limb at coxal joint
  6. fascia lata
    the broad flat sheet of deep fascia (aponeurosis) on lateral aspect of thigh
  7. iliotibial tract
    an especially dense band (extending from iliac crest to lateral condyle of tibia) within the facia lata
  8. medial mm. of hip
    six small, deeply located mm. that rotate the thigh lateraly
  9. anterior mm of thigh
    • 3 mm located on anterior aspect of thigh
    • large 4-headed quadriceps femoris m, sartorius m, and articularis genus m
  10. sartorius m.
    • "tailor's" m. - longest m belly in body, angles medially across thigh from anterior to medial (near knee)
    • origin: anterior superior iliac spine
    • insertion: medial aspect of tibial tuberosity
    • action: flex hip jt, rotate limb laterally, flex knee joint
  11. quadriceps femoris m
    • 4 heads: rectus femoris m, vastus lateralis m, vastus medialis m, and vastus intermedius m
    • 3 heads surround vastus intermedius m.
    • origin: (rectus f.)-anterior inferior iliac spine; (vastus mm)- lateral, medial and anter aspects of body of femur bone
    • insertion: tibial tuberosity (via patella and patellar ligament)
    • action: flex coxal jt (rectus femoris), extend knee joint (ALL heads)
  12. posterior mm of thigh
    3 large mm, often called hamstrings
  13. biceps femoris m
    • arises from ischium and femur bone as two heads: long (on medial side) and short (on lateral side)
    • origin: (LH)- ischiatic tuber; (SH)- lateral lip of linea aspera of femur bone
    • insertion:  head of fibula, lateral condyle of tibia
    • action: extend hip jont (LH); flex knee jt, rotate limb laterally
  14. semitendinous m.
    • intermediately postitioned hamstring
    • origin: ischiatic tuber
    • insertion: medial aspect of proximal part of tibial body
    • action: extend coxal jt, flex knee jt, rotate limb medially
    • Memory aid: "t" for laTeral
  15. semimembranosus m.
    • most medial
    • Memory aid: "m" for medial
    • origin: ischiatic tuber
    • insertion: medial condyle of tibia
    • action: extend hip joint, flex knee joint, rotate limb
  16. gracilis m.
    • origin: inferior ramus of pubis
    • insertion: medial aspect of proximal part of tibial body
    • action: adduct limb at hip jt, flex knee jt, rotate limb medially
  17. pectineus m.
    • origin: pecton of pubis
    • insertion: proximal end of post. aspect of femoral body (below lesser trochanter)
    • action: adduct limb at hip jt, flex hip jt
  18. adductor longus m.
    • "long" adductor mm
    • origin: pubis symphysis
    • insertion: middle 3rd of medial lip of linea aspera of femur bone
    • action: adduct limb at hip jt
  19. adductor brevis m.
    • origin: inferior ramus of pubis
    • insertion: medial ip of linea aspera of femur bone
    • action: adduct limb at hip joing
  20. adductor magnus m.
    • origin: ischiatic tuber, inferior ramus of pubis, ramus of ischium
    • insertion: linea aspera and adductor tubercle of femur bone
    • action: adduct limb at hip jt, extend hip jt
  21. anterolateral mm of crus
    6 mm, flexors of tarsal jt and extensors of digital jt's
  22. anterior tibial m.
    • most anterior m in crus, strongest of tarsal jt. flexors
    • origin: proximal tibia and crural interosseous membrane
    • insertion: medial cuneiform bone and first metatarsal bone
    • action: flex the talocrural jt and invert foot
  23. long digital extensor m.
    • "common" digital extensor m
    • origin: lateral condyle of tibia, proximal fibula, and crural interosseous membrane
    • insertion: distal phalanges of digits 2-5
    • action: flex talocrural jt, extend digital jts of digits 2-5
  24. extensor hallucis longus m
    • origin: middle of fibula and crural interosseous membrane
    • insertion: base of distal phalanz of big toe
    • action: extend digital jts of big toe, flex talocrural jt
  25. peroneus longus m.
    • origin: proximal 3rd of fibula
    • insertion: medial cuneiform bone and base of insertion
    • action: extend talocrural jt, evert pes
  26. peroneus brevis m
    • origin: distal half of fibula
    • insertion: base of 5th metatarsal bone
    • action: evert pes, extend the talocrural jt
  27. peroneur tertius m
    • origin: lower thrid of body of fibula
    • insertion: dorsum of base of 5th metatarsal bone
    • action: flex talocrural jt, evert pes
  28. gastrocnemius m.
    • medial and later heads
    • origin: distal post. femur bone just above med later condyles
    • insertion: tuber calcanei
    • action: extend talocrural jt, flex knee jt
  29. calcanean tendon
    • formed by the heads of medial and lateral head converging into a common tendon which then joins the tendon of the soleus m. 
  30. soleus m.
    • lies DEEP to gastrocnemius m. it's tendon blends into calcanean tendon
    • origin: proximal, posterior tibia, and fibula
    • insertion: tuber calcanei
    • action: extend talocrural jt.
  31. plantaris m
    • lies sandwiched btwn heads of gastrocnemius and soleus mm.
    • origin: lateral epicondyle of femur bone
    • insertion: tuber calcanei
    • action: extend talocrural jt
  32. popliteus m
    • origin: lateral epicondyle of femur bone
    • insertion: posterior aspect of tibia above line of soleus m
    • action: flex genual jt, rotate crus medially
  33. flexor hallucis longus m
    • analogous to flexor pollicis longus m of superior limb
    • origin: distal 2/3rds of fibula (and crural interosseous membrane)
    • insertion: base of distal phalanx of 1st digit
    • action: flex digital jts of 1st digit, extent talocrural jt, invert the pes
  34. flexor digitorum longus m.
    • origin: tibia (middle 3rd of post. surface)
    • insertion: distal phalanges of digits 2-5
    • action: flex digital jts of minor toes, extend talocrural jt
  35. posterior tibial m
    • origin: posterior aspect of tibia and fibula
    • insertion: tarsal bones (except talus) and metatarsal bones 2-4
    • action: extend talocrural jt, invert pes

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