Manual 83-89: Muscles of Leg Flashcards Preview

Anatomy Lower Limb > Manual 83-89: Muscles of Leg > Flashcards

Flashcards in Manual 83-89: Muscles of Leg Deck (93):
1

deep fascia of leg

crural fascia

2

attachements to crural fascia

- patella
- patellar ligament
- tibial tuberosity
- condyles of tibia
- head of fibula

3

the crural fascia receives fibers from tendons of ..

biceps femoris
SGT - sartorius, gracillis, semitendinosus
semimembranosus

4

describe the subcutaneous periosteum of tibia

- continuous with deep fascia anteriorly
- thicker proximally and thinner distally

5

what distally forms the retinacula of the ankle

subcutaneous periosteum of tibia

6

what muscles take partial origin from subcutaneous periosteum of tibia

- tibialis anterior
- extensor digitorum longus

7

the deep surface of the subcutaneous periosteum of tibia give rise to...

anteriro intermuscular septa and posterior intermuscular septa and deep transverse fascia

8

separates the peroneus longus and brevis from each other and from muscles of anterior and posterior crural compartments

anterior and posterior intermuscular septa

9

muscles of anterior crural compatment

- tibialis anterior
- extensor hallucis longus
- extensor hallucis capsularis
- extensor digitorum longus
- peroneus tertius

10

what m covers the anterior tibial vessels and deep peroneal n (as courses distally in leg)

TA

11

origin of TA

- lateral condyle tibia
- upper 2/3 lateral surface of tibia
- interosseous membrane
- deep crural fascia

12

insertion of TA

- medial cuneiform (medial plantar surface)
- base of 1st met (medial plantar surface)

13

innervation of TA

deep peroneal n

14

functions of TA

- inversion ankle
- dorsiflexion ankle
- supination (adduction, inverison, plantarflexion) intertarsal jts

15

distally the anterior tibial vessels and deep peroneal n lie between ______ and TA

EHL

16

origin EHL

- middle 2/3 anterior surface of fibula (medial to EDL origin)
- itnerosseous membrane (accessory origin)

17

insertion EHL

- base of distal phalanx 1st digit (crest)
- base of 1st met (additional slip_

18

innervation EHL

deep peroneal n

19

functions EHL

- extend 1st MTPJ
- dorsiflex ankle
- supination at intertarsal jt

20

origin extensor hallucis capsularis

- EHL tendon

21

insertion extensor hallucis capsularis

medial surface of capsule of 1st MPJ

22

function of extensor hallucis capsularis

- lifts capsule out of joint to prevent entrapment of capsule in joint on extension

23

lateral extreme of anterior crural compartment

extensor digitorum longus

24

origin EDL

- lateral condyle of fibula
- head of fibula
- upper 3/4 anterior surface of fibula
- interosseous membrane
- deep fascia
- anterior intermuscular septum (separating m from peroneus longus)

25

what separates the EDL from peroneus longus

anterior intermuscular septum

26

insertion of EDL

extensor expansions of digits 2-5

27

innervation of EDL

deep peroneal n

28

functions EDL

- extend MTPJ (4 lateral digits)
- dorsiflexion ankle
- eversion ankle
- pronation (abduction and eversion) (intertarsal joints)

29

the peroneus tertius is considered part of what m

extensor digitorum longus

30

origin peroneus tertius

- lower 1/3 anterior surface fibula

31

insertion peroneus tertius

- base of 5th met (passes with EDL tendon)

32

innervation peroneus tertius

deep peoneal n

33

function peroneus tertius

- dorsiflexion ankle
- eversion ankle
- pronation intertarsal joints

34

all anterior compartment m are innervated by ...

deep peroneal n

35

muscles of lateral crural compartment

peroneus longus
peroneus brevis

36

most superficial m in lateral crural compartment

peroneus longus

37

where does the common peroneal n enter the anterior compartment

between attachments of peroneus longus to fibular head and body

38

origin of peroneus longus

- lateral condyle tibia
- head fibula
- upper 2/3, lateral surface fibula
- crural fascia
- both intermuscular septa

39

insertion of peroneus longus

- base of 1st met (lateral plantar side)
- medial cuneiform (lateral plantar side)
- base of 2nd met (occasional accessory insertion)

40

function peroneus longus

- plantar flexion ankle
- eversion ankle
- pronation intertarsal jt

41

describe the course of peroneus longus

- ends in long tendon and passes posterior to lateral malleolus with tendon of peroneus brevis
- goes deep to superior peoneal retinaculum and passes across calcaneus distal to peoneal trochlea and under the inferior peroneal retinaculum
- lateral then medial side of cuboid
- goes under long plantar ligament to its insertions

42

sesamoid bone located in tendon of peroneus longus near the cuboid

os peroneum

43

m found deep to peroneus longus

peroneus brevis

44

origin of the peroneus brevis

- lower 2/3, lateral surface of fibula
- crural fascia
- both intermuscular fascia

45

insertion of the peroneus brevis

- tuberosity of 5th met

46

innervation of peroneus brevis

superficial peroneal n

47

function peroneus brevis

- plantarflex ankle
- evert ankle
- pronate intertarsal jt

48

all lateral compartment m are innervated by ..

superficial peroneal n.

49

course of peroneus brevis

- tendon passes posterior to lateral malleolus
- anteriro to tendon of peroneus longus and inserts

50

variations in lateral crural compartment

- two m are sometimes fused
- slips from peroneus longus can go to.. base of 3-5th met and adductor hallucis
- peroneus accessories m originating from fibula, between longus and brevis with tendon joining longus
- peroneus digit minimi may be a separate m

51

how often is a peoneus quartus present

10-15%
- arises on fibula, b/w peoneus brevis and flexor hallucis longus
- inserts on peroneal trochlea of calcaneus or tuberosity of cuboid

52

superficial posterior crural m group

gastrocnemius
soleus
plantaris

53

medial head gastroc origin

- medial condyle femur (proximal and posterior part)
- posterior to adductor tubercle

54

lateral head gastroc origin

- lateral condyle femur (depression on lateral side)

55

insertion gastroc

- two heads approach midline at tendinous raphe
- aponeurosis tapers distally and joins soleus m to form tendocalcaneus
- tendocalcaneus inserts central part, posterior surface of calcaneus

56

innervation gastroc

tibial n

57

functions gastroc

- plantarflex ankle
- supination (adduction and inversion) (intertarsal jts)
- flex knee

58

gastroc and soleus =

triceps surae

59

origin soleus

- head and body, posterior surface of fibula
- soleal line, middle 1/3 tibia
- tendinosus arc b/w tibia and fibula

60

what passes under the tendinous arch between tibia and fibula

politeal vessels and tibial n

61

insertion soleus

tendocalcaneus, into calcaneus

62

innervation soleus

tibial n

63

functions soleus

plantarflex ankle

64

tendon found b/w gastroc and soleus

plantaris
- runs along MEDIAL border of tendocalcaneus

65

how often is plantaris absent

10%

66

origin plantaris

- lataeral supracondylar line (femur)
- oblique popliteal ligament

67

insertion plantaris

- medial side, posterior surface of calcaneus
- tendocalcaneus occasionally

68

innervation plantaris

tibial n

69

functions plantaris

- plantarflex ankle
- flex knee

70

separates superficial and deep posterior crural muscles

deep transverse fascia

71

deep group posterior muscles

popliteus
FHL
FDL
TP tibialis posterior

72

origin popliteus m

- groove on lateral condyle femur
- arcuate popliteal ligament
- lateral meniscus

73

insertion popliteus m

body of tibia, proximal to soleal line

74

innervation popliteus

tibial n

75

functions popliteus

- flex knee
- rotate knee

WB = rotates thigh laterally
NWB = rotates leg medially

76

origin FHL

- distal 2/3 posterior surface fibula
- interosseous membrane
- posterior intermuscular septum

77

insertion FHL

base of distal phalanx, 1st digit

78

innervation FHL

tibial n

79

functions FHL

- flex (interphalangeal jt, 1st digit)
- plantarflex ankle
- supination at intertarsal jts

80

course of FHL

- tendon passes in groove, posterior surface distal tibia
- over posterior surface talus
- over inferior sruface of sustentaculum tali
- goes to sole of foot b/w two heads of FHB to its insertion

81

origin FDL

proximal 2/3 of body - posterior surface, medial to vertical lien, below soleal line on tibia

82

insertion FDL

bases, distal phalanges, digits 2-5

83

innervation FDL

tibial n

84

functions FDL

- flex DIP
- plantarflex ankle
- supination intertarsal jts

85

course of FDL

- tendon passes posterior to medial malleolus (with tendon of TP)
- passes superficial to deltoid lig
- superficial to FHL
- joined by quadratus platnae
- divides into 4 tendons going to its insertions

86

what m lies between FHL and FDL

tibialis posterior

87

origin of TP

- posterior surface interosseous membrane
- posterior surface, lateral to vertical line, below soleal line (tibia)
- proximal 2/3 medial surface fibula

88

insertion TP

- tuberosity of navicular *
- sustantaculum tali (medial, intermediate, lateral)
- three cuneiforms
- cuboid
- bases met 2-4

89

innervation TP

tibial n

90

function TP

- supination (intertarsal jts)
- plantarflex (ankle)

91

course of TP

- tendon in groove FDL to posterior medial malleolus
- deep to flexor retinaculum
- superficial to deltoid ligament
- deep plantar calcaneonavicular ligament

92

variations in posterior crural muscles

1. may be accessory heads of soleus
2. lateral head of gastroc may be absent
3. lateral head of sesamoid may contain sesamoid bone
4. popiteus may have accessory head arising from sesamoid bone of gastroc
5. popliteus minor m may be present (attaches to femur and posterior ligament of knee joint)
6. peroneotibialis m may lie deep to popliteus m (attaches to head of fibula and oblique line of tibia)
7. FHL may have accessor attachments to FDL
8. fibulocalcaneus internum m may be found with proximal attachment to fibular head and distal attachment to calcaneus
9. may be a flexor accessories digitorum longus with origin from fib or tib and insertion into quadratus plantae or directly to long flexor tendon

93

how often is there a sesamoid bone in lateral head of gastroc

2-5%
fabella