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MSAK-1 > Muscles of the Leg > Flashcards

Muscles of the Leg Flashcards

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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
What are the fibularis muscles also known as?
peroneus
26
What is the origin of the fibularis tertius?
distal 1/3 of the anterior surface of the fibular and interosseous
27
What is the insertion of the fibularis Tertius
base of 5th metatarsal
28
What are the functions of the fibularis tertius?
dorsiflexion of foot @ ankle joint, eversion of foot @ subtalar
29
What is drop foot?
damage to deep fibular nerve
30
What muscles supports the arch of the foot?
fibularis longus
31
What is the origin of the fibularis longus?
head of fibula and proximal 1/2 of the lateral surface of the fibula
32
What is the insertion of the fibularis longus?
(beside insertion of tibialis anterior) plantar aspect of the base of the 1st metatarsal and the 1st medial cuneiform
33
What are the functions of the fibularis longus?
eversion of the foot @ subtalar joint, plantar flexion of the foot @ ankle joint
34
What nerve innervates the fibularis longus?
superficial fibular nerve
35
What nerve innervates the fibularis tertius?
deep fibular
36
What is the origin of the fibularis brevis?
distal 1/2 of the lateral surface of the fibula
37
What is the insertion of the fibularis brevis?
base (tuberosity) of the 5th metatarsal bone
38
What aret he functions of the fibularis brevis?
eversion of the foot @ subtalar joint, plantar flexion of the foot @ ankle joint
39
What nerve innervates the fibularis brevis?
superficial fibular nerve
40
What is the origin of the extensor digitorum brevis?
dorsal surface of the calcaneus
41
What is the insertion of the extensor digitorum brevis
lateral side of the tendon of extensor digitorum longus for digits 2,3, 4,
42
What are the functions of the extensor digitorum brevis?
extension of digits 2, 3, 4 @ MTP, PIP, DIP
43
What nerve innervates the extensor digitorum brevis?
deep fibular nerve
44
What is the origin of the extensor hallucis brevis
dorsal surface of the calcaneus
45
What is the insertion of the extensor hallucis longus
proximal phalanx of the hallux
46
What are the functions of the extensor hallucis longus
Extension of hallux @ MPT
47
What nerve innervates the extensor hallucis longus?
deep fibular nerve
48
What is the origin of the gastrocnemius?
medial head: medial condyle of femur, lateral head: lateral condyle of the femur
49
What is the insertion of the gastrocnemius?
calcaneus via calcaneal tendon
50
What are the functions of the gastrocnemius?
flexion of leg @ knee joint, plantar flexion of the foot @ ankle joint
51
What is the origin of the soleus?
head and proximal 1/3 of fibuar, soleal line of the tibia
52
What is the insertion of the soleus?
calcaneus via calcaneal tendon
53
What are the functions of the soleus?
plantar flexion of the foot @ ankle joint
54
What is the innervation of the soleus?
tibial nerve
55
What is the innervation of the gastrocnemius?
tibial nerve
56
What is the origin of the plantaris?
the lateral supracondylar ridge of the femur
57
What is the insertion of the plantaris?
calaneus via calcaneal tendon
58
What are the functions of the plantaris?
plantar flexion of the foot @ ankle joint, flexion of the leg @ knee joint
59
What is the innervation of the plantaris?
tibial nerve
60
What is the origin of the flexor hallucis longus?
distal posterior surface of the fibula
61
What is the insertion of the hallucis longus?
distal phalanx of the hallux
62
What are the functions of the flexor hallucis longus?
flexion of the hallux@ MTP, IP, plantar flexion of the foot @ ankle joint, inversion of the foot @ subtalar joint
63
What is the innervation of the flexor hallucis longus?
tibial nerve
64
What is the origin of the flexor digitorum longus?
middle posterior surface of tibia
65
What is the insertion of the flexor digitorum longus?
distal phalanges of digits #2-5
66
What are the functions of the flexor digitorum longus?
flexion of digits #2-5 @ MTP, IP, plantarflexion of foot @ ankle joint, inversion of foot @ subtalar joint
67
What nerve innervates the flexor digitorum longus?
tibial nerve
68
What is the origin of the tibialis posterior?
proximal posterior aspect of the tibia and fibula
69
What is the insertion of the tibialis posterior?
2-4 metatarsals, navicular tuberosity, all three cuneiforms, cuboid, calcaneus
70
What are the functions of the tibialis posterior?
plantarflexion of foot @ ankle joint, inversion of the foot @ subtalar joint
71
What is the main function of the tibialis posterior?
inversion of the foot @ subtalar joint
72
What nerve innervates the tibialis posterior?
tibial nerve

MSAK-1 (19 decks)

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