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Anatomy Exam 2 > Musculature of the Leg > Flashcards

Musculature of the Leg Flashcards

1
Q

anterior compartment consists of

A

tibialis anterior

extensor digitorum longus

extensor hallucis longus

fibularis Tertius

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2
Q

anterior compartment nerve rule

A

deep fibular nerve (L5,S1)

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3
Q

tibialis anterior origin

A

upper 2/3s of the lateral surface of the tibia

interosseous membrane

superficial crural fascia

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4
Q

tibialis anterior insertion

A

median cuneiform (medial and plantar surface)

base of 1st metatarsal

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5
Q

tibialis anterior innervation

A

deep fibular nerve (L4,L5)

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6
Q

action

A

ankle dorsiflexion

foot inversion

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7
Q

extensor digitorum longus origin

A

head and anterior body of the fibula

lateral condyle of the tibia

interosseous membrane

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8
Q

extensor digitorum longus insertion

A

2-5 toes at the dorsal aponeuroses and bases of the distal phalanges

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9
Q

extensor digitorum longus innervation

A

deep fibular nerve (L4,L5)

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10
Q

extensor digitorum longus action

A

interphalangeal and metatarsophalangeal joint extension of the lateral 4 digits

ankle dorsiflexion and eversion

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11
Q

extensor hallucis longus origin

A

middle 1/3 of the medial surface of the fibula

interosseous membrane

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12
Q

extensor hallucis longus insertion

A

1st toes at the dorsal aponeurosis and the base of its distal phalanx

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13
Q

extensor hallucis longus innervation

A

deep fibular nerve (L4,L5)

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14
Q

extensor hallucis longus action

A

great toe interphalangeal and metatarsophalangeal joint extension

ankle dorsiflexion

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15
Q

fibularis tertius origin

A

anterior border of the distal fibula

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16
Q

fibularis tertius insertion

A

base of 5th metatarsal

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17
Q

fibularis tertius innervation

A

deep fibular nerve (L4,L5)

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18
Q

fibularis tertius action

A

ankle dorsiflexion

foot eversion

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19
Q

what muscles are in the lateral compartment

A

fibularis longus

fibularis brevis

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20
Q

nerve rule of the lateral compartment

A

superficial fibular nerve (L4,L5)

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21
Q

fibularis longus origin

A

head of the proximal 2/3s of the lateral surface on the fibula

rising partly from the intermuscular septum

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22
Q

fibularis longus insertion

A

base of 1st metatarsal

medial cuneiform

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23
Q

fibularis longus innervation

A

superficial fibular nerve (L5,S1)

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24
Q

fibularis longus action

A

foot eversion

weak ankle plantar flexion

supports the transverse arch of the foot

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25
Q

fibularis brevis origin

A

lateral surface of distal fibula

intermuscular septa

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26
Q

fibularis brevis insertion

A

5th metatarsal (tuberosity @ the base)

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27
Q

fibularis brevis innervation

A

superificial fibular nerve (L5,S1)

28
Q

fibularis brevis action

A

foot eversion

weak ankle plantar flexion

29
Q

nerve rule of the lateral compartment

A

superficial fibular nerve (L4,L5)

30
Q

anterior compartment nerve rule

A

deep fibular nerve (L5,S1)

31
Q

what is the posterior compartment also called

A

triceps curea

32
Q

what are the groups of the posterior compartment

A

superficial layer

deep layer

33
Q

what is the nerve rule of the posterior compartment

A

tibial nerve (S1,S2)

34
Q

gastrocnemius origin

A

medial and lateral epicondyles of femur

2 heads

35
Q

gastrocnemius insertion

A

calcaneal tuberosity via the achille’s tendon

36
Q

gastrocnemius innervation

A

tibial nerve (S1,S2)

37
Q

gastrocnemius action

A

talocrural joint plantarflexion

knee joint flexion

38
Q

soleus origin

A

fibula (head and neck, posterior surface)

tibia (soleal line via tendinous arch)

39
Q

soleus innervation

A

tibial nerve (S1,S2)

40
Q

soleus action

A

talocrural planter flexion

41
Q

plantaris origin

A

lateral epicondyle of the femur (proximal to lateral head of gastrocnemius)

42
Q

plantaris insertion

A

calcaneal tuberosity via achille’s tendon

43
Q

plantaris innervation

A

tibial nerve (S1, S2)

44
Q

plantaris action

A

negligible

may prevent compression of posterior leg musculature during knee flexion

45
Q

how are the two layers of the posterior compartment separated

A

transverse muscular septum

46
Q

what muscles are in the deep layer of the posterior compartment

A

popliteus

flexor hallucis longus

flexor digitorum longus

tibialis posterior

47
Q

popliteus origin

A

lateral femoral condyle

posterior horn of lateral meniscus

48
Q

popliteus insertion

A

posterior tibial space (above the origin at the soleus)

49
Q

popliteus innervation

A

tibial nerve (L4,S1)

50
Q

popliteus action

A

knee flexion, IR, stabilization of the knee

closed chair contraction and open chain contraction

51
Q

popliteus closed chain contraction

A

tibia is fixed, foot is on the ground

ER of the femur in order to lock the knee

52
Q

popliteus open chain contraction

A

femur is fixed

IR of the tibia to unlock the knee

53
Q

what is the popliteus responsible for

A

locking and unlocking the knee

54
Q

flexor hallucis longus origin

A

distal 2/3s of the posterior surface of the fibula

adjacent interosseous membrane

55
Q

flexor hallucis longus insertion

A

1st distal phalanx (base)

56
Q

flexor hallucis longus innervation

A

tibial nerve (L5,S2)

57
Q

flexor hallucis longus action

A

talocrural joint plantar flexion

subtalar joint inversion

Plantar flexion of MTP and IP joints of 1st toe

supports the medial longitudinal arch

58
Q

flexor digitorum longus origin

A

middle third of the posterior surface of the tibia

59
Q

flexor digitorum longus insertion

A

2nd-5th bases of the distal phalanges

60
Q

flexor digitorum longus innervation

A

tibial nerve (L5,S2)

61
Q

flexor digitorum longus action

A

talocrural joint flexion

subtalar joint inversion (supination)

2nd-5th toes MTP and IP joint plantar flexion

62
Q

tibialis posterior origin

A

interosseous membrane

adjacent borders of tibia and fibula

63
Q

tibialis posterior insertion

A

nvaicular tuberosity

medial, intermediate and lateral cuneiforms navicular

2nd-4th metatarsal bases

64
Q

tibialis posterior innervation

A

tibial nerve (L5,S2)

65
Q

tibialis posterior action

A

talcrural joint plantar flexion

subtalar joint inversion (supination)

support the longitudinal and transverse arches

66
Q

the anterior compartment is ________ to the interosseous membrane

A

anterior

lateral to the tibia

Anatomy Exam 2 (24 decks)

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