Leg muscle attachments Flashcards Preview

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Flashcards in Leg muscle attachments Deck (58):
1

What are the 3 compartments of the leg? (3)

1. posterior
2. lateral
3. anterior

2

What can the muscles in the posterior compartment in the leg be split into? (2)

1. superficial group
2. deep group

3

What are the muscles of the superficial group in the posterior compartment of the leg? (3)

1. gastrocnemius
2. plantaris
3. soleus

4

What is the origin of gastrocnemius? (medial and lateral head)

medial

1. posterior surface of distal femur just superior to medial condyle

lateral

1. upper posterolateral surface lateral femoral condyle

5

What is the insertion of gastrocneumius?

- via calcaneal tendon

- to posterior surface of calcaneus

6

What is the innervation of gastrocnemius?

tibial nerve

7

What is the function of gastrocnemius?

plantar flexes foot

flexes the knee

8

What is the origin of plantaris?

inferior part of lateral supracondylar line of femur

oblique popliteal ligament of knee

9

What is the insertion of popliteus?

via calcaneal tendon

to posterior surface of calcaneus

10

What is the innervation of popliteus?

tibial nerve

11

What is the function of popliteus?

plantar flexes foot

flexes knee

12

What is the origin to soleus? (6)

1. soleal line

2. medial border of tibia

3. posterior aspect of fibular head

4. adjacent surfaces of fibular neck

5. proximal shaft of fibula

6. tendinous arch between tibial and fibular attachments

13

What is the insertion of soleus?

via calcaneal tendon

posterior surface of calcaneus

14

what is the innervation of soleus?

tibial nerve

15

What is the function of soleus?

plantar flexes the foot

16

What are the muscles in the deep group of the posterior compartment of the leg? (4)

1. popliteus
2. flexor hallucis longus
3. flexor digitorum longus
4. tibialis posterior

17

What is the origin of popliteus?

lateral femoral condyle

18

What is the insertion of popliteus?

posterior surface of proximal tibia

19

What is the innervation of popliteus?

tibial nerve

20

What is the function of popliteus? (2)

1. stabalises knee joint - resists lateral rotation of tibia on femur
2. unlocks knee joint - laterally rotates femur on fixed tibia

21

What is the origin of flexor hallucis longus? (2)

1. posterior surface of fibula
2. adjacent interosseous membrane

22

What is the insertion of flexor hallucis longus?

plantar surface of distal phalanx of great toe

23

What is the innervation to flexor hallucis longus?

tibial nerve

24

What is the function of flexor hallucis longus?

flexes great toe

25

What is the origin of flexor digitorum longus?

medial side of posterior surface of the tibia

26

What is the insertion of flexor digitorum longus?

plantar surfaces of bases of distal phalanxes of the lateral 4 toes

27

What is the innervation to flexor digitorum longus?

tibial nerve

28

What is the function of flexor digitorum longus?

flexes lateral 4 toes

29

What is the origin of tibialis posterior? (2)

1. posterior surfaces of inetrosseous membrane

2. adjacent regions of tibia and fibula

30

What is the insertion of tibialis posterior? (2)

1. mainly tuberosity of navicular

2. adjacent region of medial cuneiform

31

What is the innervation of tibialis posterior?

tibial nerve

32

What is the function of tibialis posterior? (3)

1. inversion of foot

2. plantar flexion of foot

3. support of medial arch of foot during walking

33

What are the muscles of the lateral compartment of the leg? (2)

1. fibularis longus
2. fibularis brevis

34

What is the origin of fibularis longus? (3)

1. upper lateral surface of fibula

2. head of fibula

3. occasionally the lateral tibial condyle

35

What is the insertion of fibularis longus? (2)

1. undersurface of lateral sides of distal end of medial cuneiform

2. base of metatarsal I

36

What is the innervation of fibularis longus?

superficial fibular nerve

37

What is the function of fibularis longus? (3)

1. eversion of the foot

2. plantar flexion of foot

3. supports arches of the foot

38

What is the origin for fibularis brevis?

1. lower 2/3rds of lateral surface of shaft of fibula

39

What is the insertion of fibularis brevis?

lateral tubercle at base of metatarsal V

40

What is the innervation to fibularis brevis?

superficial fibular nerve

41

What is the function to fibularis brevis?

eversion of the foot

42

What are the muscles of the anterior compartment of the leg? (4)

1. tibialis anterior
2. extensor hallucis longus
3. extensor digitorum longus
4. fibularis tertius

43

What is the origin of tibialis anterior? (2)

1.lateral surface of tibia

2. adjacent interosseous membrane

44

What is the insertion for tibialis anterior? (2)

1. medial and inferior surfaces of medial cuneiform

2. adjacent surfaces on base of metatarsal I

45

What is the innervation of tibialis anterior?

deep fibular nerve

46

What is the function of tibialis anterior? (3)

1. dorsiflexion of foot at ankle joint

2. inversion of foot

3. dynamic support of medial arch of foot

47

What is the origin of extensor hallucis longus? (2)

1. middle one half of medial surface of fibula

2. adjacent surface of interosseous membrane

48

What is the insertion of extensor hallucis longus?

dorsal surface of base of distal phalanx of great toe

49

What is the innervation of extensor hallucis longus?

deep fibular nerve

50

What is the function of extensor hallucis longus? (2)

1. extension of the great toe

2. dorsiflexion of foot

51

What is the origin of extensor digitorum longus? (2)

1. proximal 1 half of medial surface of fibula

2. related surface of lateral tibial condyle

52

What is the insertion of extensor digitorum longus?

1. via dorsal digital expansions into the bases of distal and middle phalanges of the lateral 4 toes

53

What is the innervation to extensor digitorum longus?

deep fibular nerve

54

What is the function of extensor digitorum longus? (2)

1. extension of lateral 4 toes

2. dorsiflexion of foot

55

What is the origin to fibualris tertius?

distal part of medial surface of fibula

56

What is the insertion of fibualris tertius?

dorsomedial surface of base of metatarsal V

57

What is the innervation of fibularis tertius?

deep fibualr nerve

58

What is the function of fibularis tertius? (2)

1. dorsiflexion of the foot

2. eversion of the foot