Leg Muscles Flashcards Preview

S1 Anatomy > Leg Muscles > Flashcards

Flashcards in Leg Muscles Deck (59):
1

muscles of anterior compartment of leg

tibialis anterior
extensor hallucis longus
entensor digitorum ongus
peroneus tertius

2

tibialis anterior
-origin

lateral condyle of tibia
superior 1/2 of lateral tibia

3

tibialis anterior
-insertion

medial and inferior surface of
-medial cuneiform
-1st metatarsal

4

tibialis anterior
-actions

foot dorsiflexion
foot inversion
supports the medial longitudinal arch

5

tibialis anterior
-innervation

deep fibular nerve (L4, L5)

6

extensor hallucis longus
-origin

middle part of anterior surface of fibula
interosseus membrane

7

extensor hallucis longus
-insertion

dorsal aspect of base of distal phalanx of hallux

8

extensor hallucis longus
-actions

hallux extension
foot dorsiflexion

9

extensor hallucis longus
-innervation

deep fibular (L4, L5)

10

entensor digitorum longus
-origin

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

11

entensor digitorum longus
-insertion

middle and distal phalanges of lateral 4 digits

12

entensor digitorum longus
-actions

extends lateral 4 digits
dorsiflexes foot

13

entensor digitorum longus
-innervation

deep fibular (L4, L5)

14

peroneus (fibular) tertius
-origin

inferior 1/3 of anterior surface of fibula
interosseus membrane

15

peroneus (fibular) tertius
-insertion

dorsum of base of 5th metatarsal

16

peroneus (fibular) tertius
-actions

foot dorsiflexion
aids in foot eversion

17

peroneus (fibular) tertius
-innervation

deep fibular (L4, L5)

18

muscle of lateral compartment of leg

peroneus longus
peroneus brevis

19

peroneus (fibular) longus
-origin

head and superior 2/3 of lateral surface of fibula

20

peroneus (fibular) longus
-insertion

base of first metatarsal
medial cuneiform

21

peroneus (fibular) longus
-actions

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

22

peroneus (fibular) longus
-innervation

superficial fibular (L5, S1, S2)

23

peroneus brevis
-origin

inferior 2/3 of lateral surface of fibula

24

peroneus brevis
-insertion

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

25

peroneus brevis
-actions

foot eversion
weak plantarflexion

26

peroneus brevis
-innervation

superficial fibular nerve (L5, S1, S2)

27

muscles of the superficial posterior compartment of the leg

gastrocnemius
soleus
plantaris

28

gastrocnemius
-origin

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

29

gastrocnemius
-insertion

posterior surface of calcaneus via tendo calcaneus

30

gastrocnemius
-actions

plantar flexes foot
raises heel during walking
flexes knee

31

gastrocnemius
-innervation

tibial nerve (S1, S2)

32

soleus
-origin

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

33

soleus
-insertion

posterior surface of calcaneus via tendo calcaneus

34

soleus
-actions

plantar flexes foot
raises heel during walking

35

soleus
-innervation

tibial nerve (S1, S2)

36

plantaris
-origin

inferior end of lateral supracondylar line of femur
oblique popliteal ligament

37

plantaris
-insertion

fuses with tendo calcaneus

38

plantaris
-action

weakly assists in plantarflexion and flexion of knee

39

plantaris
-innervation

tibial nerve (S1, S2)

40

muscles of the deep posterior compartment of the leg

popliteus
flexor hallucis longus
flexor digitorum longus
tibialis posterior

41

popliteus
-origin

lateral surface of lateral condyle of femur and lateral meniscus

42

popliteus
-insertion

posterior surface of tibia superior to soleal line

43

popliteus
-actions

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

44

popliteus
-innervation

tibial nerve (L4, L5, S1)

45

flexor hallucis longus
-origin

inferior 2/3 of posterior surface of fibula
inferior part of interosseus membrane

46

flexor hallucis longus
-insertion

base of distal phalanx of hallux

47

flexor hallucis longus
-action

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

48

flexor hallucis longus
-innervation

tibial nerve (S2, S3)

49

flexor digitorum longus
-origin

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

50

flexor digitorum longus
-insertion

bases of distal phalanges of lateral 4 digits

51

flexor digitorum longus
-actions

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

52

flexor digitorum longus
-innervation

tibial nerve (S2, S3)

53

tibialis posterior
-origin

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

54

tibialis posterior
-insertion

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

55

tibialis posterior
-actions

plantarflexes foot
inverts foot
supports
-transverse arch
-medial longitudinal arch

56

tibialis posterior
-innervation

tibial nerve (L4, L5)

57

muscles that support medial longitudinal arch

tibialis anterior
peroneus longus
flexor hallucis longus
flexor digitorum longus
tibialis posterior

58

muscles that support lateral longitudinal arch

peroneus longus
flexor hallucis longus?

59

muscles that support transverse longitudinal arch

peroneus longus
tibialis posterior