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MSAK-1 > Muscles of the Leg > Flashcards

Muscles of the Leg Flashcards

1
Q

How many compartments are in the leg? What are they separated by?

A

deep fascia of the leg forms three intermusclular sepate that divide the leg in to three main compartments

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2
Q

What are the compartments of the leg?

A

anterior, lateral, posterior

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3
Q

What does the anterior compartment of the leg house and what are its functions?

A

houses four muscles involved with dorsiflexion of the foot, extension of the toes and inversion/eversion of the foot

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4
Q

What nerve innervates the anterior compartment of the leg?

A

deep fibular nerve

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5
Q

What does the lateral compartment of the leg house and what are its functions?

A

houses two muscles involved with plantar flexion and eversion of the foot

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6
Q

What nerve innervates the lateral compartment of the leg?

A

superficial fibular nerve

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7
Q

What is the posterior compartment of the leg divided into?

A

superficial and deep

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8
Q

What are the superficial posterior compartment’s functions?

A

plantar flexions of the foot

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9
Q

What are the deep posterior compartments’ functions?

A

flexors of toes, inversion of the foot

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10
Q

What muscles of the posterior compartment of the leg acts on the knee joint?

A

popliteus

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11
Q

What nerve innervates the posterior compartment of the leg?

A

tibial nerve

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12
Q

What is the origin of the tibialis anterior?

A

the proximal lateral surface of the tibia

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13
Q

What is the insertion of the tibialis anterior?

A

the plantar aspect of the 1st metatarsal and the medial cuneiform

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14
Q

What are the functions of the tibialis anterior?

A

dorsiflexion of the foot @ the ankle joint and inversion of the foot @ subtalar joint

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15
Q

What is the main function of the tibialis anterior?

A

inversion of the foot @ subtalar joint

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16
Q

What nerve innervates the tibialis anterior?

A

deep fibular nerve

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17
Q

What is the origin of the extensor hallucis longus?

A

middle portion of the fibula on the anterior surface

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18
Q

What is the insertion of the extensor hallucis longus?

A

dorsal surface of the distal phalanx of the big toe

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19
Q

What are the functions of the extensor hallucis longus?

A

extension of the hallux @ MTP + IP, dorsiflexion of foot @ ankle joint, inversion of food @ subtalar

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20
Q

What nerve innervates the extensor hallucis longus?

A

deep fibular nerve

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21
Q

What is the origin of the extensor digitorum longus?

A

most of the anterior surface of the fibula, lateral condyle of the tibia

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22
Q

What is the insertion of the extensor digitorum longus?

A

middle and distal phalanges of digits #2-5

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23
Q

What are the functions of the extensor digitorum longus?

A

eversion of foot @ subtalar joint, extension of digits #2-5 @ MTP + IP, dorsiflexion of foot @ ankle joint

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24
Q

What nerve innervates the extensor digitiorm longus

A

deep fibular

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25
Q

What are the fibularis muscles also known as?

A

peroneus

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26
Q

What is the origin of the fibularis tertius?

A

distal 1/3 of the anterior surface of the fibular and interosseous

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27
Q

What is the insertion of the fibularis Tertius

A

base of 5th metatarsal

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28
Q

What are the functions of the fibularis tertius?

A

dorsiflexion of foot @ ankle joint, eversion of foot @ subtalar

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29
Q

What is drop foot?

A

damage to deep fibular nerve

30
Q

What muscles supports the arch of the foot?

A

fibularis longus

31
Q

What is the origin of the fibularis longus?

A

head of fibula and proximal 1/2 of the lateral surface of the fibula

32
Q

What is the insertion of the fibularis longus?

A

(beside insertion of tibialis anterior) plantar aspect of the base of the 1st metatarsal and the 1st medial cuneiform

33
Q

What are the functions of the fibularis longus?

A

eversion of the foot @ subtalar joint, plantar flexion of the foot @ ankle joint

34
Q

What nerve innervates the fibularis longus?

A

superficial fibular nerve

35
Q

What nerve innervates the fibularis tertius?

A

deep fibular

36
Q

What is the origin of the fibularis brevis?

A

distal 1/2 of the lateral surface of the fibula

37
Q

What is the insertion of the fibularis brevis?

A

base (tuberosity) of the 5th metatarsal bone

38
Q

What aret he functions of the fibularis brevis?

A

eversion of the foot @ subtalar joint, plantar flexion of the foot @ ankle joint

39
Q

What nerve innervates the fibularis brevis?

A

superficial fibular nerve

40
Q

What is the origin of the extensor digitorum brevis?

A

dorsal surface of the calcaneus

41
Q

What is the insertion of the extensor digitorum brevis

A

lateral side of the tendon of extensor digitorum longus for digits 2,3, 4,

42
Q

What are the functions of the extensor digitorum brevis?

A

extension of digits 2, 3, 4 @ MTP, PIP, DIP

43
Q

What nerve innervates the extensor digitorum brevis?

A

deep fibular nerve

44
Q

What is the origin of the extensor hallucis brevis

A

dorsal surface of the calcaneus

45
Q

What is the insertion of the extensor hallucis longus

A

proximal phalanx of the hallux

46
Q

What are the functions of the extensor hallucis longus

A

Extension of hallux @ MPT

47
Q

What nerve innervates the extensor hallucis longus?

A

deep fibular nerve

48
Q

What is the origin of the gastrocnemius?

A

medial head: medial condyle of femur, lateral head: lateral condyle of the femur

49
Q

What is the insertion of the gastrocnemius?

A

calcaneus via calcaneal tendon

50
Q

What are the functions of the gastrocnemius?

A

flexion of leg @ knee joint, plantar flexion of the foot @ ankle joint

51
Q

What is the origin of the soleus?

A

head and proximal 1/3 of fibuar, soleal line of the tibia

52
Q

What is the insertion of the soleus?

A

calcaneus via calcaneal tendon

53
Q

What are the functions of the soleus?

A

plantar flexion of the foot @ ankle joint

54
Q

What is the innervation of the soleus?

A

tibial nerve

55
Q

What is the innervation of the gastrocnemius?

A

tibial nerve

56
Q

What is the origin of the plantaris?

A

the lateral supracondylar ridge of the femur

57
Q

What is the insertion of the plantaris?

A

calaneus via calcaneal tendon

58
Q

What are the functions of the plantaris?

A

plantar flexion of the foot @ ankle joint, flexion of the leg @ knee joint

59
Q

What is the innervation of the plantaris?

A

tibial nerve

60
Q

What is the origin of the flexor hallucis longus?

A

distal posterior surface of the fibula

61
Q

What is the insertion of the hallucis longus?

A

distal phalanx of the hallux

62
Q

What are the functions of the flexor hallucis longus?

A

flexion of the hallux@ MTP, IP, plantar flexion of the foot @ ankle joint, inversion of the foot @ subtalar joint

63
Q

What is the innervation of the flexor hallucis longus?

A

tibial nerve

64
Q

What is the origin of the flexor digitorum longus?

A

middle posterior surface of tibia

65
Q

What is the insertion of the flexor digitorum longus?

A

distal phalanges of digits #2-5

66
Q

What are the functions of the flexor digitorum longus?

A

flexion of digits #2-5 @ MTP, IP, plantarflexion of foot @ ankle joint, inversion of foot @ subtalar joint

67
Q

What nerve innervates the flexor digitorum longus?

A

tibial nerve

68
Q

What is the origin of the tibialis posterior?

A

proximal posterior aspect of the tibia and fibula

69
Q

What is the insertion of the tibialis posterior?

A

2-4 metatarsals, navicular tuberosity, all three cuneiforms, cuboid, calcaneus

70
Q

What are the functions of the tibialis posterior?

A

plantarflexion of foot @ ankle joint, inversion of the foot @ subtalar joint

71
Q

What is the main function of the tibialis posterior?

A

inversion of the foot @ subtalar joint

72
Q

What nerve innervates the tibialis posterior?

A

tibial nerve

MSAK-1 (19 decks)

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