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Anatomy > 33. Anterior and Lateral Leg, Dorsum of Foot > Flashcards

33. Anterior and Lateral Leg, Dorsum of Foot Flashcards

1
Q

What is the name given to the fascia of the leg?

A

Crural fascia

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2
Q

What direction do the fibres of the interosseous membrane run in?

A

Inferolaterally from tibia to fibula

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3
Q

Functions of interosseous membrane?

A

Surface for muscle attachment

Help resist downward pull of the muscles attached to fibula

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4
Q

Classification of the superior tibiofibular joint?

A

Plane synovial

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5
Q

Articulations of superior tibiofibular joint?

A

Head of fibula

Facet on lateral tibial condyle

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6
Q

Movements possible at superior tibiofibular joint?

A

Slight sliding (plane joint) during dorsiflexion of ankle

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7
Q

How many muscles are in the anterior compartment of the leg?

A

4

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8
Q

How many muscles are in the lateral compartment of the leg?

A

2

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9
Q

Action of anterior compartment of leg?

A

Extend ankle joint (i.e. dorsiflexion) and digits

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10
Q

Action of lateral compartment of leg?

A

Evert foot

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11
Q

Where do the tendons of the muscles of the lateral compartment of the leg insert?

A

Posterior to lateral malleolus

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12
Q

What muscles are in the the lateral compartment of the leg?

A

Peroneus longus

Peroneus brevis

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13
Q

Origin of peroneus longus?

A

Head and upper 2/3 of lateral fibula

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14
Q

Insertion of peroneus longus?

A

Base of 1st metatarsal and medial cunieform

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15
Q

Innervation of of peroneus longus?

A

Superficial peroneal nerve L5, S1, S2

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16
Q

Origin of peroneus brevis?

A

Inferior 2/3 of lateral fibula

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17
Q

Insertion of peroneus brevis?

A

Tuberosity of lateral side of base of 5th metatarsal

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18
Q

Innervation of peroneus brevis?

A

Superficial peroneal nerve L5, S1, S2

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19
Q

Which muscles make up the anterior compartment of the leg?

A

Tibialis anterior
Extensor digitorum longus
Peroneus tertius
Extensor hallucis longus

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20
Q

Common innervation of anterior compartment of leg?

A

Deep peroneal nerve L4, L5

21
Q

Origin of tibialis anterior?

A

Lateral condyle of tibia,
superior 1/2 of lateral tibial surface,
interosseous membrane

22
Q

Insertion of tibialis anterior?

A

Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal

23
Q

Action of tibialis anterior?

A

Dorsiflexes ankle

Inverts foot

24
Q

Origin of EDL?

A

Lateral condyle of tibia
Superior 3/4 of medial surface of fibula
Interosseous membrane

25
Q

Instertion of EDL?

A

Middle and distal phalanges of lateral 4 digits

26
Q

Action of EDL?

A

Extends lateral 4 digits

Dorsiflexes ankle

27
Q

Origin of peroneus tertius?

A

Inferior 1/3 anterior fibula and interosseous membrane

28
Q

Insertion of peroneus tertius?

A

Dorsum of base of 5th metatarsal

29
Q

Action of peroneus tertius?

A

Dorsiflexes ankle

Assists in eversion of foot

30
Q

Origin of EHL?

A

Middle anterior surface of fibula

Interosseous membrane

31
Q

Insertion of EHL?

A

Dorsal aspect of distal phalanx of hallux

32
Q

Action of EHL?

A

Extends hallux

Dorsiflexes ankle

33
Q

Where does the superior extensor retinaculum run?

A

Anterior border of tibia

To lower end of fibula

34
Q

Where does the inferior extensor retinaculum run?

A

Stem - lateral part of calcaneus
Upper part - medial malleolus
Lower part - medial part of foot to blend with fascia of abductor hallucis

35
Q

What muscles are found in the dorsum of the foot?

A

Extensor hallucis brevis

Extensor digitorum brevis

36
Q

Where do the muscles in the dorsum of the foot originate?

A

Superior surface of calcaneus and inferior extensor retinaculum

37
Q

Where do the muscles in the dorsum of the foot insert?

A

EHB - base of proximal phalanx of hallux

EDB - long extensor tendons of toes 2 - 4

38
Q

Innervation of muscles of dorsum of foot?

A

Deep peroneal nerve L5, S1

39
Q

Where is the superficial peroneal nerve found?

A

Between peroneus longus and neck of fibula

40
Q

What does the superficial peroneal nerve supply?

A

Muscles of lateral compartment of leg

Continues as cutaneous nerve to distal anterior surface of leg and most of dorsum of foot

41
Q

Where is the deep peroneal nerve found?

A

Between peroneus longus and neck of fibula

Passes through extensor digitorum longus

42
Q

What artery does the deep peroneal nerve travel with?

A

Anterior tibial artery

43
Q

What does the deep peroneal nerve supply?

A

Anterior compartment muscles
Extensor digitorum brevis and extensor hallucis brevis
Cutaneous to skin between digits 1 and 2

44
Q

What cutaneous nerve supplies innervation to the majority of the anterior leg?

A

Saphenous (from femoral)

45
Q

What does the popliteal artery branch into at the level of popliteus?

A

Anterior and posterior tibial arteries

46
Q

What does the posterior tibial artery branch into?

A

Fibular artery

47
Q

What does the anterior tibial artery become once past the ankle?

A

Dorsalis pedis

48
Q

What are the branches of the dorsalis pedis artery?

A

Lateral tarsal
Arcuate
Deep plantar

49
Q

What two branches of the dorsalis pedis artery anastomose?

A

Lateral tarsal and arcuate

Anatomy (49 decks)

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