lower extremity muscles

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Author:
palmdutch
ID:
283571
Filename:
lower extremity muscles
Updated:
2014-09-20 11:10:35
Tags:
muscles
Folders:

Description:
origin, insertion, actions and nerve supply for the muscles of the lower extremity
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  1. Iliacus- origin
    • iliac fossa
    • sacrum
  2. Iliacus- insertion
    lesser trochanter/femur
  3. Iliacus- actions
    • 1. Flexion of the femur at the hip joint
    • 2. Flexion of the vertebral column
    • 3. Helps maintain posture (integrity of the vertebral column)
  4. Iliacus- nerve supply
    femoral (L2, L3, L4)
  5. Psoas Major- origin
    bodies and transverse processes/lumbar vertebrae
  6. Psoas Major- insertion
    lesser trochanter/femur
  7. Psoas Major- actions
    • 1. Flexion of the femur at the hip joint
    • 2. Flexion of the vertebral column
    • 3. Helps maintain posture (integrity of the vertebral column)
  8. Psoas Major- nerve supply
    femoral (L2, L3, L4)
  9. Psoas Minor-origin
    bodies/lumbar vertebrae
  10. Psoas Minor- insertion
    iliopubic eminence/pubis
  11. Psoas Minor- actions
    Flexion of the pelvic bone (upward movement)
  12. Psoas Minor- nerve suppy
    L1 (always) (sometimes L2)
  13. Sartorius- origin
    anterior superior iliac spine
  14. Sartorius- insertion
    superior medial shaft/tibia
  15. Sartorius- actions
    • 1. Flexion of the hip joint and knee joint (functions when both are carried out at the same time)
    • 2. Abducts and laterally rotates the femur
    • 3. Medially rotates the leg
  16. Sartorius- nerve supply
    femoral nerve (L2, L3, L4)
  17. Rectus Femoris- origin
    • anterior inferior illiac spine
    • acetabulum/pelvic bone
  18. Rectus Femoris- insertion
    base of the patella
  19. Rectus Femoris- actions
    • 1. Flexes femur at hip joint
    • 2. extend leg at knee joint
    • 3. tonus of the muscle plays a role in strengthening the knee joint
  20. Rectus Femoris- nerve supply
    femoral nerve (L2, L3, L4)
  21. Vastus Lateralis- origin
    greater trochanter and linea aspera/femur
  22. Vastus Lateralis- insertion
    base of the patella
  23. Vastus Lateralis- actions
    • 1. extend leg at knee joint
    • 2. tonus of the muscle plays a role in strengthening the knee joint
  24. Vastus Lateralis- nerve supply
    femoral nerve (L2, L3, L4)
  25. Vastus Medialis- origin
    linea aspera/femur
  26. Vastus Medialis- insertion
    base of the patella
  27. Vastus Medialis- actions
    • 1. extend leg at knee joint
    • 2. tonus of the muscle plays a role in strengthening the knee joint
  28. Vastus Medialis- nerve supply
    femoral nerve (L2, L3, L4)
  29. Vastus Intermedius- origin
    anterior-lateral aspect and linea aspera/femur
  30. Vastus Intermedius- insertion
    base of the patella
  31. Vastus intermedius- actions
    • 1. extend leg at knee joint
    • 2. tonus of the muscle plays a role in strengthening the knee joint
  32. Vastus Intermedius- nerve supply
    femoral nerve (L2, L3, L4)
  33. Articularis Genu- from what muscle and actions
    • Vastus intermedius
    • 1. Retracts the synovial membrane of the knee joint to help stabilize the knee
  34. Gracilis- origin
    ramus/ischium and inferior ramus/pubis
  35. Gracilis- insertion
    superior medial shaft/tibia
  36. Gracilis- actions
    • 1. Flexion of leg
    • 2. Adducts femur
  37. Gracilis- nerve supply
    obturator (L2, L3, L4)
  38. Pectineus- origin
    superior ramus (pubic pecten)/ramus
  39. Pectineus- insertion
    pectineal line/femur
  40. Pectineus- actions
    • 1. Adducts femur
    • 2. Flexion at hi joint
  41. Pectineus- nerve supply
    femoral (L2, L3, L4) and obturator (L2, L3, L4)
  42. Adductor Longus- origin
    superior ramus/pubis
  43. Adductor longus- insertion
    linea aspera/femur
  44. Adductor longus- actions
    adducts femur
  45. Adductor Longus- nerve supply
    obturator (L2, L3, L4)
  46. Adductor Brevis- origin
    inferior ramus/pubis
  47. Adductor Brevis- insertion
    pectineal line and linea aspera/femur
  48. Adductor Brevis- actions
    adducts femur
  49. Adductor Brevis- nerve supply
    obturator (L2, L3, L4)
  50. Adductor Magnus- orgin
    rami/isium and pubis
  51. Adductor Magnus- insertion
    linea aspera and adductor tubricle/femur
  52. Adductor Magnus- actions
    • 1. adducts femur
    • 2. extends femur at hip joint
  53. Adductor Magnus- nerve supply
    oburator (L2, L3, L4) and sciatic (L4-S3)
  54. Tensor Fascia Lata- origin
    crest of the ilium
  55. Tensor Fascia Lata- insertion
    iliotibial tract
  56. Tensor Fascia Lata- actions
    • 1. Flexes, adducts and medially rotates femur
    • 2. Helps to stabilize the knee joint
  57. Tensor Fascia Lata- nerve supply
    superior gluteal (L4, L5, S1)
  58. Gluteus Maximus- origin
    • posterior gluteal line/ilium
    • sacrum and coccyx
    • posterior ligaments of the sacroiliac joint
  59. Gluteus Maximus- insertion
    • gluteal tuberosity/femur
    • iliotibial tract
  60. Gluteus Maximus- actions
    • 1. extends and laterally rotates the femur
    • 2. helps to stabilize the pelvic bone
    • 3. stabilizes the knee joint
  61. Gluteus Maximus- nerve supply
    inferior gluteal (L5, S1, S2)
  62. Gluteus Medius- origin
    external surface/ilium
  63. Gluteus Medius- insertion
    greater trochanter/femur
  64. Gluteus Medius- actions
    • 1. abducts femur
    • 2. medially rotates the femur 
    • 3. helps keep the pelvic bone steady when foot on opposite side is raised off the ground
    • (same for gluteus minimus)
  65. Gluteus Medius- nerve supply
    superior gluteal (L4, L5, S1)
  66. Gluteus Minimus- origin
    external surface/ilium
  67. Gluteus Minimus- insertion
    greater trochanter/femur
  68. Gluteus Minimus- actions
    • 1. abducts femur
    • 2. medially rotates the femur 
    • 3. helps keep the pelvic bone steady when foot on opposite side is raised off the ground
    • (same for gluteus medius)
  69. Gluteus Minimus- nerve supply
    superior gluteal (L4, L5, S1)
  70. Piriformis- origin
    anterior surface of the sacrum (within pelvic cavity)
  71. Piriformis- insertion
    greater trochanter/femur
  72. Piriformis- actions
    lateral rotation of the femur
  73. Piriformis- nerve supply
    L1, L2
  74. Superior Gemellus- origin
    spine/ischium
  75. Superior Gemellus- insertion
    greater trochanter/femur
  76. Superior Gemellus- actions
    lateral rotation of the femur
  77. Superior Gemellus- nerve supply
    L4, L5, S1, S2
  78. Obturator Internus- origin
    internal surface of the obturator membrane
  79. Obturator Internus- insertion
    greater trochanter/femur
  80. Obturator Internus- actions
    lateral rotation of the femur
  81. Obturator Internus- nerve supply
    L4, L5, S1, S2
  82. Inferior Gemellus- origin
    tuberosity/ischium
  83. Inferior Gemellus- insertion
    greater trochanter/femur
  84. Inferior Gemellus- actions
    lateral rotation of the femur
  85. Inferior Gemellus- nerve supply
    L4, L5, S1, S2
  86. Obturator Externus- orgin
    external surface of the obturator membrane
  87. Obturator Externus- insertion
    trochanteric fossa/femur
  88. Obturator Externus- actions
    lateral rotation of the femur
  89. Obturator Externus- nerve supply
    Obturator (L2, L3, L4)
  90. Quadratus Femoris- orgin
    tuberosity/ischium
  91. Quadratus Femoris- insertion
    quadrate tubercle/femur
  92. Quadratus Femoris- actions
    lateral rotation of the femur
  93. Quadratus Femoris- nerve supply
    L4, L5, S1, S2
  94. Semitendinosus-insertion
    medial condyle and proximal posterior shaft/tibia
  95. Semitendinosus- origin
    ischial tuberosity
  96. Semitendinosus- nerve supply
    sciatic nerve (L4-S3)
  97. Semitendinosus- actions
    • flexion of the leg at the knee joint
    • medially rotate the leg (tibia)
    • stabilize the hip joint, extension of the femur
  98. Semimembranosus- origin
    ischial tuberosity
  99. Semimembranosus- insertion
    medial condyle/tibia
  100. Semimembranosus- actions
    • flexion of the leg at the knee joint
    • medially rotate the leg (tibia)
    • stabilize the hip joint, extension of the femur
  101. Semimembranosus- nerve supply
    sciatic nerve (L4-S3)
  102. Biceps Femoris- origin
    ischial tuberosity
  103. Biceps Femoris- insertion
    • head/fibula
    • lateral condyle/tibia
  104. Biceps Femoris- actions
    • flexion of the leg at the knee joint
    • laterally rotate the leg (tibia)
    • Except the short head: stabilize the hip joint, extension of the femur
  105. Biceeps Femoris- nerve supply
    sciatic nerve (L4-S3)

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