Leg Muscles Flashcards Preview

S1 Anatomy > Leg Muscles > Flashcards

Flashcards in Leg Muscles Deck (59)
Loading flashcards...
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