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MSK exam 3 AP lower limb > musculature of leg and dorsum of foot > Flashcards

musculature of leg and dorsum of foot Flashcards

1
Q

muscles of anterior crural compartment and dorsum of the foot? 5

A

tibialis anterior

extensor digitorum longus

flbularis tertius

extensor hallucis longus

extensor digitorum brevis

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2
Q

lateral crural ligaments?

A

fibularis longus

fibularis brevis

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3
Q

attachments of tibialis anterior? 2 insertions !!

A

origin: lateral surface of most of tibia and interosseous membrane
insertion: medial cuneiform and base of first metatarsal

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4
Q

talus has how many articulating surfaces?

A

3
fibula
tibia
navicular

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5
Q

action of tibialis anterior?

A

dorsiflex and invert foot

POWERFUL INVERTER OF FOOT**

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7
Q

attachments of extensor digitorum longus?

A

origin:most of anterior surface of fibula and interosseous membrane

insertion:
middle and distal phalanges of four lesser digits

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8
Q

innervation of tibialis anterior?

A

deep fibular nerve

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9
Q

action of extensor digitorum longus?

A

extens toes, dorsiflexes foot**has fibular tertius

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10
Q

sustentaculum

A

on calcaneus

maintains talus superiorly by acting as a shelf for body of talus

allows for arch

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11
Q

how many compartments in leg?

A

4

anterior and posterior intermuscular septa

transverse intermuscular septa

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12
Q

innervation of extensor digitorum longus?

A

deep fibular nerve

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13
Q

lateral retinaculum?

A

superior fibular and inferior fibular

over everters

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14
Q

flexor retinaculum?

A

medial side of foot

for flexors

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15
Q

muscles of anterior crural compartment?

A

tibialis anterior

extensor digitorum longus

extensor hallucis longus

fibularis tertius

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16
Q

attachment of fibularis tertius

A

origin:distal anterior surface of fibula (continuation of extensor digitorum longus

)insertion:base of 5th metatarsal

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17
Q

extensor retinaculum?

A

super and inferior-over extensors of foot

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18
Q

action of fibularis tertius

A

aids in eversion and dorsiflexion

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19
Q

innervation of fibularis tertius?

A

deep fibular nerve

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20
Q

attachments of extensor hallucis longus?

A

origin:mid-portion of fibula, deep to tibialis anterior and extensor digitoruminsertion:base of distal phalanx of great toe (Hallux)

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21
Q

action of extensor hallucis longus?

A

extends great toe, dorsiflexes foot

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22
Q

attachment of extensor digitorum brevis?

A
  • *only muscle on dorsum of foot
  • has extensor hallucis brevis component

origin:dorsal surface of calcaneusinsertion:base of proximal phalanx of great toe and proximal phalanges of toes 2,3 and 4 which attach in concert with tendons of extensor digitorum longus

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23
Q

innervation of extensor hallucis longus?

A

deep fibular nerve

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24
Q

action of extensor digitorum brevis?

A

extend toes 1,2,3,4

25
Q

muscles of lateral crural compartments

A

everters

flbularis longus

fibularis brevis

26
Q

attachment of fibularis longus?

A

origin:upper lateral two thirds of fibula

insertion:first metatarsal and medial cuneiform (goes on the bottom side of the foot)
BIFURCATES at the base of the first metatarsal and medial cuneiform

27
Q

innervation of extensor digitorum brevis?

A

deep fibular nerve

28
Q

action of fibularis longus?

A

everts and plantar flexes foot

29
Q

attachments of fibularis brevis

A

origin: distal lateral fibula
insertion: base of fifth metatarsal

30
Q

innervation of fibularis longus?

A

superficial fibular nerve

31
Q

action of fibularis brevis

A

everts and plantar flexes the foot

32
Q

muscles of posterior crural compartment? superficial 3

deep 4

A

superficial layer:gastrocnemius
soleus
plantaris

deep layer:popliteus

flexor digitorum longus

flexor hallucis longus

tibialis posterior

33
Q

attachments of gastrocnemius

A

origin: posterior surfaces of roughened area of lateral and medial femoral condyles
insertion: calcaneus in common with soleus and plantaris muscles

34
Q

action of gastrocnemius (remember it crosses two joints)

A

plantar flexes foot, flexes leg

used in every running step

35
Q

innervation of fibular brevis

A

superficial fibular nerve

36
Q

triceps serae?

A

gastrocnemius

soleus

plantaris

37
Q

attachments of soleus

A

origin: posterior surface of head and proximal shaft of fibula, soleal line on upper portion of tibia
insertion: calcaneus with grastrocnemius and plantaris muscle

MUTLIPENATE

38
Q

action of soleus? DOES NOT cross two joints

A

plantar flexes foot

more for jumping

39
Q

innervation of gastrocnemius

A

tibial nerve

40
Q

attachments of the plantaris?

A

origin: posterior surface of lateral femoral condyle
insertion: calcaneus with gastrocnemius and soleus

41
Q

innervation of soleus?

A

tibial nerve

42
Q

action of plantaris?

A

weakly plantar flex foot and flex leg

43
Q

innervation of plantaris?

A

tibial nerve

44
Q

action of popliteus?

A

flexes and medially rotates leg

when foot is fixed, laterally rotates femur to unlock knee joint as leg flexion proceeds

45
Q

attachments of popliteus?

A

origin:lateral surface of lateral condyle of femurinsertion:proximal tibia above soleal line

46
Q

achilles tendons

A

triceps serae

gastrocnemius
plantaris
soleus

47
Q

attachments of flexor digitorum longus?

A

origin:posterior surface, mid portion of tibia

insertion:base of distal phalanx of four small toes
BIPENATE

48
Q

innervation of popliteus?

A

tibial nerve

49
Q

action of flexor digitorum longus?

A

flexes four small toes, plantar flexes foot

50
Q

attachments of tibialis posterior?

A

origin: posterior surface of upper portion of tibia, fibula and intervening interosseous membrane
insertion: plantar surface of metatarsals 2,3,4, navicular, medial cuneiform mainly, but also to ALL other tarsals except talus

BIPENATE

51
Q

innervation of flexor digitorum longus?

A

tibial nerve

52
Q

action of tibialis posterior?

A

inverts and plantar flexes foot

53
Q

tendons behind medial malleolus?

A

behind the medial malleolus anteromedial to posterolateral–> Tom, Dick, and Harry-

54
Q

innervation of tibialis posterior?

A

tibial nerve

55
Q

order of the muscle bellies in the superior portion

A

Dick, Tom and Harry

56
Q

Flexor hallucis longus

A

origin–> distal two thirds of posterior surface of fibula and adjacent interosseous membrane

insertion
base of distal phalanx of great toe

57
Q

action of hallucis longus

A

flexes great toes

plantar flexes foot

58
Q

innervation hallucis longus

A

tibial nerv e

MSK exam 3 AP lower limb (15 decks)

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