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GROSS ANATOMY 2 > Anterior and Lateral Leg and Dorsum of Foot. > Flashcards

Anterior and Lateral Leg and Dorsum of Foot. Flashcards

1
Q

Where is the interosseous membrane?

A

Between the tibia and fibula

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2
Q

What is the function of the interosseous membrane?

A
  • Surface of muscle attachment
  • Resist downward pull of muscles attached to fibula
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3
Q

What type of joint is the superior tibiofibular joint?

A

Plane synovial joint

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4
Q

Where does the superior tibiofibular joint lie?

A

Head of fibula and facet on lateral tibial condyle

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5
Q

What movement occurs at the superior tibiofibular joint?

A

Slight movement during dorsiflexion of ankle

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6
Q

What is this muscle?

A

Peroneus longus

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7
Q

What is the origin of the peroneus longus?

A

Head and upper 2/3 of lateral fibula

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8
Q

What is the insertion of the peroneus longus?

A

Base of 1st metatarsal and medial cuneiform

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9
Q

What innervates the peroneus longus?

A

Superficial peroneal nerve (L5,S1,2)

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10
Q

What is this muscle?

A

Peroneus brevis

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11
Q

What is the origin of the peroneus brevis?

A

Inferior 2/3 of lateral fibula

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12
Q

What is the insertion of the peroneus brevis?

A

Tuberosity on lateral side of base of 5th metatarsal

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13
Q

What innervates the peroneus brevis?

A

Superficial peroneal nerve (L5,S1,2)

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14
Q

What is this muscle?

A

Tibialis anterior

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15
Q

What is the origin of the tibialis anterior?

A
  • Lateral condyle of tibia
  • Superior 1/2 of lateral tibial surface
  • Interosseous membrane
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16
Q

What is the insertion of the tibialis anterior?

A
  • Medial and inferior surfaces of medial cuneiform
  • Base of 1st metatarsal
17
Q

What is the innervation of the tibialis anterior?

A

Deep peroneal nerve (L4,5)

18
Q

What is the function of the tibialis anterior?

A
  • Dorsiflexes ankle
  • Inverts foot
19
Q

What is this muscle?

A

Extensor digitorum longus

20
Q

What is the origin of the extensor digitorum longus?

A
  • Lateral condyle of tibia
  • Superior 3/4 of medial surface fibula
  • Interosseous membrane
21
Q

What is the insertion of the extensor digitorum longus?

A

Middle and distal phalanges of lateral 4 digits

22
Q

What innervates the extensor digitorum longus?

A

Deep peroneal nerve (L4,5)

23
Q

What is the function of the extensor digitorum longus?

A
  • Extends lateral 4 digits
  • Dorsiflexion of ankle
24
Q

What is this muscle?

A

Peroneus tertius

25
Q

What is the origin of the peroneus tertius?

A
  • Inferior 1/3 anterior fibula
  • Interosseous membrane
26
Q

What is the insertion of the peroneus tertius?

A

Dorsum of base of 5th metatarsal

27
Q

What innervates peroneus tertius?

A

Deep peroneal nerve (L4,5)

28
Q

What is the function of the peroneus tertius?

A
  • Dorsiflexes ankle
  • Assists in eversion of foot
29
Q

What is this muscle?

A

Extensor hallucis longus

30
Q

What is the origin of the extensor hallucis longus?

A
  • Middle anterior surface fibula
  • Interosseous membrane
31
Q

What is the insertion of the extensor hallucis longus?

A

Dorsal aspect of distal phalanx of hallux

32
Q

What innervates the extensor hallucis longus?

A

Deep peroneal nerve (L4,5)

33
Q

What is the function of the extensor hallucis longus?

A
  • Extends hallux
  • Dorsiflexes ankle
34
Q

Where does the superior extensor retinaculum attach?

A

Anterior border of tibia –> lower end of fibula

35
Q

What are these muscles?

A

Black - extensor hallucis brevis
Blue - extensor digitorum brevis

36
Q

What is the common origin of the extensor digitorum brevis and extensor hallucis brevis?

A
  • Superior surface of calcaneus
  • Inferior extensor retinaculum
37
Q

What is the insertion of the extensor hallucis? brevis

A

Base of proximal phalanx of hallux

38
Q

What is the insertion of the extensor digitorum brevis?

A

Long extensor tendons of toes 2-4

39
Q

What innervates the muscles of the dorsum of the foot?

A

Deep peroneal nerve L5/S1

GROSS ANATOMY 2 (19 decks)

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