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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

(57 cards)

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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?

Study These Flashcards
A

extend toes 1,2,3,4

25
Q

muscles of lateral crural compartments

Study These Flashcards
A

everters

flbularis longus

fibularis brevis

26
attachment of fibularis longus?
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
innervation of extensor digitorum brevis?
deep fibular nerve
28
action of fibularis longus?
everts and plantar flexes foot
29
attachments of fibularis brevis
origin: distal lateral fibula insertion: base of fifth metatarsal
30
innervation of fibularis longus?
superficial fibular nerve
31
action of fibularis brevis
everts and plantar flexes the foot
32
muscles of posterior crural compartment? superficial 3 deep 4
superficial layer:gastrocnemius soleus plantaris deep layer:popliteus flexor digitorum longus flexor hallucis longus tibialis posterior
33
attachments of gastrocnemius
origin: posterior surfaces of roughened area of lateral and medial femoral condyles insertion: calcaneus in common with soleus and plantaris muscles
34
action of gastrocnemius (remember it crosses two joints)
plantar flexes foot, flexes leg used in every running step
35
innervation of fibular brevis
superficial fibular nerve
36
triceps serae?
gastrocnemius soleus plantaris
37
attachments of soleus
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
action of soleus? DOES NOT cross two joints
plantar flexes foot more for jumping
39
innervation of gastrocnemius
tibial nerve
40
attachments of the plantaris?
origin: posterior surface of lateral femoral condyle insertion: calcaneus with gastrocnemius and soleus
41
innervation of soleus?
tibial nerve
42
action of plantaris?
weakly plantar flex foot and flex leg
43
innervation of plantaris?
tibial nerve
44
action of popliteus?
flexes and medially rotates leg when foot is fixed, laterally rotates femur to unlock knee joint as leg flexion proceeds
45
attachments of popliteus?
origin:lateral surface of lateral condyle of femurinsertion:proximal tibia above soleal line
46
achilles tendons
triceps serae gastrocnemius plantaris soleus
47
attachments of flexor digitorum longus?
origin:posterior surface, mid portion of tibia insertion:base of distal phalanx of four small toes BIPENATE
48
innervation of popliteus?
tibial nerve
49
action of flexor digitorum longus?
flexes four small toes, plantar flexes foot
50
attachments of tibialis posterior?
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
innervation of flexor digitorum longus?
tibial nerve
52
action of tibialis posterior?
inverts and plantar flexes foot
53
tendons behind medial malleolus?
behind the medial malleolus anteromedial to posterolateral--> Tom, Dick, and Harry-
54
innervation of tibialis posterior?
tibial nerve
55
order of the muscle bellies in the superior portion
Dick, Tom and Harry
56
Flexor hallucis longus
origin--> distal two thirds of posterior surface of fibula and adjacent interosseous membrane insertion base of distal phalanx of great toe
57
action of hallucis longus
flexes great toes | plantar flexes foot
58
innervation hallucis longus
tibial nerv e

MSK exam 3 AP lower limb (15 decks)

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