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MSK III > Musculature of leg and dorsum foot > Flashcards

Musculature of leg and dorsum foot Flashcards

1
Q

origin and insertion of tibialis anterior

A

origin: lateral surface most of tibia and interosseous membrane
insertion: medial cuneiform and base of first metatarsal

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2
Q

what is the action of tibialis anterior

A

dorsiflexes and inverts foot

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3
Q

what inn tibialis anterior

A

deep fibular

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4
Q

origin and insertion extensor digitorum longus

A

origin: most anterior surface of fibula and interosseous membrane
insertion: middle and distal phalanges of toes 2-5

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5
Q

action of extensor digitorum longus

A

extends toes and dorsiflexes foot

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6
Q

what inn extensor digitorum longus

A

deep fibular n

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7
Q

origin and insertion of fibularis tertius

A

origin: distal anterior surface of fibula
insertion: base of 5th metatarsal

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8
Q

action of fibularis tertius

A

aids in eversion and dorsiflexion

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9
Q

what inn fibularis tertius

A

deep fibular n

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10
Q

origin and insertion of extensor hallucis longus

A

origin: mid portion of fibula deep to tibialis anterior
insertion: base of distal phalanx of great toe

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11
Q

action of extensor hallucis longus

A

extends great toe and dorsiflexes foot

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12
Q

what inn extensor hallucis longus

A

deep fibular n

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13
Q

origin and insertion of extensor digitorum brevis

A

origin: dorsal surface of calcaneus
insertion: base proximal phalanx of great toe and proximal phalanges toes 2-4

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14
Q

action of extensor digitorum brevis

A

extends toes 1-4

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15
Q

what inn extensor digitorum brevis

A

deep fibular n

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16
Q

origin and insertion of fibularis longus

A

origin: lateral 2/3 of fibula
insertion: first metatarsal and medial cuneiform

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17
Q

action of fibularis longus

A

everts and plantar flexes foot

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18
Q

how does fibularis longus evert foot

A

passes underneath

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19
Q

what inn fibularis longus

A

superficial fibular n

20
Q

origin and insertion of fibularis brevis

A

origin: distal lateral fibula
insertion: base of 5th metatarsal

21
Q

action of fibularis brevis

A

everts and plantar flexes foot

22
Q

what inn fibularis brevis

A

superficial fibular n

23
Q

what are the superficial mm in the posterior crural compartment

A

gastrocnemius, soleus and plantaris

24
Q

origin and insertion of gastrocnemius

A

origin: posterior surfaces of roughened area of lateral and medial femoral condyles
insertion: calcaneus

25
Q

what is the action of gastrocnemius

A

plantar flexes foot and flexes the leg

26
Q

inn of gastroc

A

tibial n

27
Q

origin and insertion of soleus

A

origin: posterior surface of head and proximal shaft fibula, soleal line on upper portion tibia
insertion: calcaneus

28
Q

what is the action of soleus

A

plantar flexes foot- jumping

29
Q

what inn soleus

A

tibial n

30
Q

origin and insertion of plantaris

A

origin: posterior surface of lateral femoral condyle
insertion: calcaneus

31
Q

what is the action of plantaris

A

weakly plantar flexes foot and flexes leg

32
Q

what inn plantaris

A

tibial n

33
Q

what mm are in the deep layer of posterior crural

A

popliteus, flexor digitorum longus, flexor hallucis longus, tibialis posterior

34
Q

origin and insertion of popliteus

A

origin: lateral surface of lateral condyle of femur
insertion: proximal tibia above soleal line

35
Q

action of popliteus

A

flexes and medially rotates leg

when foot is fixed laterall rotates femur to unlock knee joint

36
Q

what inn popliteus

A

tibial n

37
Q

origin and insertion of flexor digitorum longus

A

origin: posterior surface mid portion tibia
insertion: base of distal phalanx of 4 small toes

38
Q

what is the action of flexor digitorum longus

A

flex toes 2-5 and plantar flex foot

39
Q

what inn flexor digitorum longus

A

tibial n

40
Q

origin and insertion of flexor hallucis longus

A

origin: distal 2/3 os posterior fibula and interosseous membrane
insertion: base of distal phalanx of great toe

41
Q

what is action of flexor hallucis longus

A

flexes big toe and plantar flex foot

42
Q

what inn flexor hallucis longus

A

tibial n

43
Q

origin and insertion of tibialis posterior

A

origin: posterior surface upper portion of tibia, fibula and interosseous membrane
insertion: plantar surface of metatarsals 2-4, navicular, medial cuneiform and all other tarsals EXCEPT talus

44
Q

action of tibialis posterior

A

inverts and pantar flexes foot

45
Q

what inn tibialis posterior

A

tibial n

MSK III (9 decks)

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