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S1 Anatomy > Leg Muscles > Flashcards

Leg Muscles Flashcards

1
Q

muscles of anterior compartment of leg

A

tibialis anterior
extensor hallucis longus
entensor digitorum ongus
peroneus tertius

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2
Q

tibialis anterior

-origin

A

lateral condyle of tibia

superior 1/2 of lateral tibia

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3
Q

tibialis anterior

-insertion

A

medial and inferior surface of

  • medial cuneiform
  • 1st metatarsal
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4
Q

tibialis anterior

-actions

A

foot dorsiflexion
foot inversion
supports the medial longitudinal arch

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5
Q

tibialis anterior

-innervation

A

deep fibular nerve (L4, L5)

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6
Q

extensor hallucis longus

-origin

A

middle part of anterior surface of fibula

interosseus membrane

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7
Q

extensor hallucis longus

-insertion

A

dorsal aspect of base of distal phalanx of hallux

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8
Q

extensor hallucis longus

-actions

A

hallux extension

foot dorsiflexion

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9
Q

extensor hallucis longus

-innervation

A

deep fibular (L4, L5)

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10
Q

entensor digitorum longus

-origin

A

lateral condyle of tibia
superior 3/4 of anterior surface of fibula
interosseus membrane

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11
Q

entensor digitorum longus

-insertion

A

middle and distal phalanges of lateral 4 digits

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12
Q

entensor digitorum longus

-actions

A

extends lateral 4 digits

dorsiflexes foot

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13
Q

entensor digitorum longus

-innervation

A

deep fibular (L4, L5)

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14
Q

peroneus (fibular) tertius

-origin

A

inferior 1/3 of anterior surface of fibula

interosseus membrane

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15
Q

peroneus (fibular) tertius

-insertion

A

dorsum of base of 5th metatarsal

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16
Q

peroneus (fibular) tertius

-actions

A

foot dorsiflexion

aids in foot eversion

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17
Q

peroneus (fibular) tertius

-innervation

A

deep fibular (L4, L5)

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18
Q

muscle of lateral compartment of leg

A

peroneus longus

peroneus brevis

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19
Q

peroneus (fibular) longus

-origin

A

head and superior 2/3 of lateral surface of fibula

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20
Q

peroneus (fibular) longus

-insertion

A

base of first metatarsal

medial cuneiform

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21
Q

peroneus (fibular) longus

-actions

A 
foot eversion
weak foot plantarflexion
tendon supports
-transverse arch
-medial longitudinal arch
-lateral longitudinal arch
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22
Q

peroneus (fibular) longus

-innervation

A

superficial fibular (L5, S1, S2)

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23
Q

peroneus brevis

-origin

A

inferior 2/3 of lateral surface of fibula

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24
Q

peroneus brevis

-insertion

A

dorsal surface of tuberosity on lateral side of base of 5th metatarsal

25
Q

peroneus brevis

-actions

A

foot eversion

weak plantarflexion

26
Q

peroneus brevis

-innervation

A

superficial fibular nerve (L5, S1, S2)

27
Q

muscles of the superficial posterior compartment of the leg

A

gastrocnemius
soleus
plantaris

28
Q

gastrocnemius

-origin

A

lateral head
-lateral aspect of lateral condyle of femur
medial head
-popliteal surface of femur, superior to medial condyle

29
Q

gastrocnemius

-insertion

A

posterior surface of calcaneus via tendo calcaneus

30
Q

gastrocnemius

-actions

A

plantar flexes foot
raises heel during walking
flexes knee

31
Q

gastrocnemius

-innervation

A

tibial nerve (S1, S2)

32
Q

soleus

-origin

A

posterior aspect of head of fibula
superior 1/4 of fibula
soleal line
medial border of tibia

33
Q

soleus

-insertion

A

posterior surface of calcaneus via tendo calcaneus

34
Q

soleus

-actions

A

plantar flexes foot

raises heel during walking

35
Q

soleus

-innervation

A

tibial nerve (S1, S2)

36
Q

plantaris

-origin

A

inferior end of lateral supracondylar line of femur

oblique popliteal ligament

37
Q

plantaris

-insertion

A

fuses with tendo calcaneus

38
Q

plantaris

-action

A

weakly assists in plantarflexion and flexion of knee

39
Q

plantaris

-innervation

A

tibial nerve (S1, S2)

40
Q

muscles of the deep posterior compartment of the leg

A

popliteus
flexor hallucis longus
flexor digitorum longus
tibialis posterior

41
Q

popliteus

-origin

A

lateral surface of lateral condyle of femur and lateral meniscus

42
Q

popliteus

-insertion

A

posterior surface of tibia superior to soleal line

43
Q

popliteus

-actions

A

weakly flexes knee
unlocks knee
-rotates femur laterally on fixed tibia
-rotates tibia medially on fixed femur

44
Q

popliteus

-innervation

A

tibial nerve (L4, L5, S1)

45
Q

flexor hallucis longus

-origin

A

inferior 2/3 of posterior surface of fibula

inferior part of interosseus membrane

46
Q

flexor hallucis longus

-insertion

A

base of distal phalanx of hallux

47
Q

flexor hallucis longus

-action

A

flexes hallux at all joints
plantar flexes foot
supports longitudinal arch of foot

48
Q

flexor hallucis longus

-innervation

A

tibial nerve (S2, S3)

49
Q

flexor digitorum longus

-origin

A

medial part of posterior surface of tibia inferior to soleal line
to fibula via broad aponeurosis

50
Q

flexor digitorum longus

-insertion

A

bases of distal phalanges of lateral 4 digits

51
Q

flexor digitorum longus

-actions

A

flexes lateral 4 digits
plantarflexes foot
suports medial longitudinal arch of foot

52
Q

flexor digitorum longus

-innervation

A

tibial nerve (S2, S3)

53
Q

tibialis posterior

-origin

A

interosseus membrane
posterior surface o tibia inferior to soleal line
posterior surface of fibula

54
Q

tibialis posterior

-insertion

A

tuberosity of navicular
all three cuneiform bones (and cuboid bone?)
bases of 2nd, 3rd, 4th metatarsals

55
Q

tibialis posterior

-actions

A 
plantarflexes foot
inverts foot
supports
-transverse arch
-medial longitudinal arch
56
Q

tibialis posterior

-innervation

A

tibial nerve (L4, L5)

57
Q

muscles that support medial longitudinal arch

A 
tibialis anterior
peroneus longus
flexor hallucis longus
flexor digitorum longus
tibialis posterior
58
Q

muscles that support lateral longitudinal arch

A

peroneus longus

flexor hallucis longus?

59
Q

muscles that support transverse longitudinal arch

A

peroneus longus

tibialis posterior

S1 Anatomy (31 decks)

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