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anatomy > LL3. anterior/posterior leg > Flashcards

LL3. anterior/posterior leg Flashcards

1
Q

action of anterior compartment of leg

A

dorsiflexion and extension of toes (metatarsal, interphalangeal joint)

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2
Q

Tibialis anterior origin

A

lateral tibia

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3
Q

Tibialis anterior insertion

A

medial cuneiform

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4
Q

Tibialis anterior action

A

inversion of foot
dorsiflexion

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5
Q

anterior leg innervation

A

deep fibular nerve

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6
Q

Extensor digitorum longus action

A

extends phalanges
dorsiflexion

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7
Q

Extensor digitorum longus action origin

A

lateral condyle of tibia/medial fibula

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8
Q

Extensor digitorum longus action insertion

A

lateral 4 digits

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9
Q

Extensor digitorum longus action position/palpation

A

positioned laterally and deep to the tibialis anterior
Its four tendons can be palpated on the dorsal surface of the foot

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10
Q

Extensor hallucis longus origin

A

medial surface of fibula

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11
Q

Extensor hallucis longus insertion

A

big toe (hallucis)

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12
Q

Extensor hallucis longus action

A

extends big toe

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13
Q

does everyone have fibilaris tertius?

A

nope

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14
Q

BLOOD SUPPLY to anterior leg

A

anterior tibial artery
-> pierces interosseous membrane to become anterior

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15
Q

when does anterior tibial artery become dorsal pedis

A

after ankle joint -> feel pulse

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16
Q

ANTERIOR TIBIAL STRESS SYNDROME

A

shin splints
microtrauma to tibialis anterior and periosteum of tibia

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17
Q

general action of lateral leg

A

eversion and weak plantar flexion

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18
Q

Peroneus (fibularis) longus origin

A

fibula

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19
Q

cause of foot drop

A

damage to common fibular nerve
= no dorsiflexion

20
Q

Which muscle produces eversion at the subtalar joint?

A

fibularis tertius

21
Q

the nerve roots of the deep fibular nerve

A

L4-S1

22
Q

fibularis longus origin

A

superior/lateral surface of fibula
lateral condyle

23
Q

fibularis longus insertion

A

1st metatarsal and medial cuneiform bone

24
Q

fibularis longus action

A

weak plantar flexion
eversion
supports arch

25
Q

lateral leg innervation

A

superficial fibular nerve

26
Q

fibularis brevis origin

A

interosseus membrane

27
Q

fibularis brevis insertion

A

5th metatarsal

28
Q

fibularis brevis action

A

eversion

29
Q

is fibularis brevis or longus more superficial?

A

longus is superficial to brevis

30
Q

COMMON FIBULAR NERVE INJURY

A
  • fractured neck of fibula = injures where nerve wraps round ⇒ foot drop
  • casts = compresses neck of fibula
31
Q

muscles of superior posterior leg

A

gastrocnemius
soleus
plantaris

32
Q

insertion of posterior superficial muscles

A

form calcaneus tendon = achilles

33
Q

innervation of deep posterior muscles

A

tibial branch of sciatic nerve

34
Q

blood supply to posterior deep muscles

A

posterior tibial artery (branch of popliteal artery)

35
Q

function of superficial posterior muscles

A

plantarflexion and flexion of toes

36
Q

function of deep posterior muscles

A

flexion of toes

37
Q

Gastrocnemius origin

A

medial condyle - m head
lateral condyle - l head

38
Q

Gastrocnemius action

A

lot of force = plantarflexion (releve)
flexion of toes
flex knee
-> tires easily

39
Q

gastrocnemius innervation

A

superficial fibular nerve

40
Q

Soleus origin

A

Originates from the soleal line of the tibia and proximal fibula

41
Q

Soleus action

A

plantarflexion (releve)
flexion of toes
contraction compresses veins for venous return
-> postural function

42
Q

Plantaris origin

A

plantarflexion/knee flexion

43
Q

popliteus origin, insertion, action

A

lateral condyle
proximal tibia, above soleus
lateral rotation of femur to allow flexion of knee

44
Q

Flexor digitorum longus origin

A

medial tibia

45
Q

Flexor digitorum longus action

A

flexion of lateral 4 toes

46
Q

Flexor digitorum longus insertion

A

plantar surface of lateral 4 digits

anatomy (15 decks)

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