Notecard 5

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Author:
hw.hair
ID:
284977
Filename:
Notecard 5
Updated:
2014-10-06 00:18:14
Tags:
muscles
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Quiz
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muscles
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  1. Tibialis anterior: tibia- towards the front

    Action: prime mover of dorsal flexion; inverts foot
    • O: lateral condyle and upper 2/3 of tibial shaft; interosseus membrane 
    • I: by tendon into inferior surface of medial cuneiform and first metatarsal bone
  2. Extensor digitorum longus: increases angle at joint- toe -long

    Action: prime mover of toe extension; dorsiflexes foot
    • O: lateral condyle of tibia; proximal 3/4 of fibula; interosseus membrane 
    • I: middle and distal phalanges of toes 2-5
  3. Fibularis (peroneus) tertius: fibula- third

    Action: dorsiflexes and everts foot
    • O: distal anterior surface of fibula and interosseus membrane 
    • I: tendon inserts on dorsum of 5th metatarsal
  4. Extensor hallucis longus: increase angle at joint- great toe- long

    Action: extends great toe; dorsiflexes foot
    • O: anteromedial fibula shaft and interosseus membrane
    • I: tendon inserts on distal phalanx of great toe
  5. Fibularis (peroneus) longus: fibula- long

    Action: plantar flexes and everts foot
    • O: head and upper portion of lateral aspect of fibula
    • I: by long tendon that curves under foot to first metatarsal and medial cuneiform
  6. Fibularis (peroneus) brevis: fibula- short

    Action: plantar flexes and everts foot
    • O: distal fibula shaft
    • I: tendon inserts on proximal end of 5th metatarsal
  7. Gastrocnemius: belly- leg

    Action: plantar flexes foot when knee is extended; flexes knee when foot is dorsiflexed
    • O: by two heads from medial and lateral condyles of femur
    • I: posterior calcaneus via calcaneal tendon
  8. Soleus: fish

    Action: plantar flexes foot; important locomotor and postural muscle
    • O: extensive cone-shaped origin from superior tibia, fibula, and interosseus membrane 
    • I: posterior calcaneus via calcaneal tendon
  9. Plantaris: sole of foot

    Action: assists in knee flexion and plantar foot flexion
    • O: posterior femus above lateral condyle 
    • I: via a tendon into calcaneus or calcaneus tendon
  10. Popliteal: back of knee

    Action: flexes and rotates leg medially to unlock extended knee; rotates thigh laterally with tibia fixed
    • O: lateral condyle of femur and lateral meniscus
    • I: proximal tibia
  11. Flexor digitorum longus: decrease angle at joint- toe- long

    Action: plantar flexes and inverts foot; flexes toes; help foot "grip" ground
    • O: extensive origin on the posterior tibia
    • I: tendon runs behind medial malleolus and inserts into distal phalanges of toes 2-5
  12. Flexor hallucis longus: decrease angle at joints- great toe- long

    Action: plantar flexes and inverts foot; flexes great toe at all joints; "push off" muscles during walking
    • O: midshaft of fibula and interosseus membrane
    • I: tendon runs under foot to distal phalanx of great toe
  13. Tibialis posterior: tibia- towards the back

    Action: prime mover of foot inversion; plantar flexes foot
    • O: extensive origin from superior tibia and fibula and interosseus membrane 
    • I: tendon passes under arch of foot and inserts onto several tarsals and metatarsals 2-4

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