Knee and Ankle Muscles

Card Set Information

Author:
sandykillian
ID:
125797
Filename:
Knee and Ankle Muscles
Updated:
2012-01-03 17:28:20
Tags:
knee ankle muscles
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Description:
Knee and Ankle Muscles
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  1. Rectus femoris
    • Origin-anterior inferior iliac spine, ilium at upper rim of acetabulum
    • Insertion-patella, tibial tuberosity via patellar ligament
    • Actions-knee extention, assists hip flexion
    • Part of Quads with vastus lateralis, intermedius, medialis
  2. Vastus Lateralis
    • Origin-linea aspera of femur, greater trochanter of femur
    • Insertion-patella, tibial tuberosity via patellar ligament
    • Actions-knee extension
    • Part of Quads with rectus femoris, vastus intermedius, medialis
  3. Vastus Intermedius
    • Origin-anterior and lateral femoral shaft
    • Insertion-patella, tibial tuberosity via patellar ligament
    • Actions-knee extension
    • Part of Quads with rectus femoris, vastus lateralis, medialis
  4. Vastus Medialis
    • Origin-linea aspera of femur, intertrochanteric line of femur
    • Insertion-patella, tibial tuberosity via patellar ligament
    • Actions-knee extension
    • Part of Quads with rectus femoris, vastus lateralis, intermedius
  5. Biceps Femoris
    • Origin-long head-ischial tuberosity, short head-linea aspera of femur
    • Insertion-head of fibula-lateral aspect, lateral condyle of tibia
    • Actions-knee flexion, tibia ER when knee is flexed, long head-hip extension
    • Part of hamstrings group with semi-membranosus and semi-tendinosus
  6. Semi-Membranosus
    • Origin-ischial tuberosity
    • Insertion-posterior medial tibial condyle
    • Actions-hip extension, knee extension, tibia IR when knee is flexed
    • Part of hamstrings group with biceps femoris and semi-tendinosus
  7. Semi-Tendinosus
    • Origin-ischial tuberosity
    • Insertion-anterior proximal tibial shaft
    • Actions-knee extension, hip extension, tibia IR when knee is flexed
    • Part of hamstrings group with biceps femoris and semi-membranosus
  8. Tibialis Anterior
    • Origin-lateral condyle of tibia, lateral shaft of tibia, interosseous membrane
    • Insertion-base of 1st metatarsal-plantar surface, medial cuneiform tarsal bone-plantar surface
    • Actions-dorsiflexion of ankle, inversion of foot
  9. Gastrocnemius
    • Origin-medial head-medial epicondyle of femur, lateral head-lateral epicondyle of femur
    • Insertion-calcaneus via calcaneal tendon (tendo Achilles)
    • Actions-plantarflexion of ankle, assists knee flexion
  10. Soleus
    • Origin-soleal line of tibia, posterior head of fibula, upper shaft of fibula
    • Insertion-calcaneus via calcaneal tendon (tendo Achilles)
    • Actions-plantarflexiion of ankle
  11. Tibialis Posterior
    • Origin-posterior tibia, posterior fibula, interosseous membrane
    • Insertion-navicular tarsal bone, adjacent tarsals and metatarsals on planter surface
    • Actions-inversion of foot, assists plantarflexion of ankle
  12. Peroneus Longus (fibularis longus)
    • Origin-head and lateral shaft of fibula-upper 2/3
    • Insertion-base of 1st metatarsal-plantar survace, medial cuneiform tarsal bone-plantar surface
    • Actions-eversion of foot, assists plantarflexion of ankle
  13. Peroneus Brevis (fibularis brevis)
    • Origin-lateral shaft of fibula-lower 2/3
    • Insertion-base of 5th metatarsal-lateral surface
    • Actions-eversion of foot, assists plantarflexion of ankle
  14. Tensor fascia latae and iliotibial band
    • Origin-iliac crest-posterior to anterior superior iliac spine
    • Insertion-iliotibial tract (attaches to the lateral condyle of tibia)
    • Actions-assists hip flexion, assists hip abd, assists hip IR, assists knee extension, assists stability of extended knee in standing and ambulation

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